Showing papers in "Defence Science Journal in 1992"
TL;DR: In this paper, the effect of speed ratio and axial spacing between contra-rotors on the aerodynamic performance of a contra-stage was investigated and the traverses of flow structure and pressure variation were examined at upstream of the first and second rotor.
Abstract: This article presents an experimental investigation into the effect of speed ratio and axial spacing between contra-rotors on the aerodynamic performance of a contra-stage. The traverses of flow structure and pressure variation are examined at upstream of the first and the second rotor to illustrate the effect of speed ratio and axial spacing on the aerodynamic performances. The traverse results are analysed to obtain relative total head loss and blade element efficiency of the contra-rotors. The reveals that the aerodynamics of a contra-stage is significantly affected by the speed ratio as well as the axial spacing between contra-rotors.
23Â citations
TL;DR: In this paper, the behavior of expanding metallic cylinders under explosive loading was studied using ultra high speed photography, and the expansion characteristics of aluminium and copper metallic cylinders were evaluated with different c/m ratio, and by changing the nature of high explosive.
Abstract: The behaviour of expanding metallic cylinders under explosive loading was studied. Using ultra high speed photography, the expansion characteristics of aluminium and copper metallic cylinders have been evaluated with different c/m ratio, and by changing the nature of high explosive. The results obtained are comparable to those predicted by the Gurney's energy and momentum balance equations. A cylinder test has been established for comparative to the metal by octol, TNT, PEK-1, baratol and composition B are calculated. The results are in close agreement with those calculated by Kury et al.
22Â citations
TL;DR: In this article, an experimental procedure for the determination of overall kinetic parameters for the exothermic decomposition reaction of nitramine propellant was described, which is applicable to reactions whose behaviour can be described by the Arrhenius equation and the general rate law.
Abstract: The paper describes an experimental procedure for the determination of overall kinetic parameters for the exothermic decomposition reaction of nitramine propellant. The kinetic parameters can be obtained through the use of differential thermal analysis (DTA), differential scanning calorimetry (DSC) or thermogravimetric analysis (TGA) methods. The procedure is applicable to reactions whose behaviour can be described by the Arrhenius equation and the general rate law. In the present work, DSC technique has been used for the evaluation of Arrehenius activation parameters and specific rate constants for thermal decomposition of a typical nitramine propellant. The kinetic parameters were computed by Ozawa and Kissinger methods for comparison. The activation energy value obtained from the Ozawa method is refined by an iteration procedure using Doyle approximation for the Arrhenius temperature integral p(x).
18Â citations
TL;DR: The major factors that limit the performance of enzyme-linked immunosorbent assays (ELISAs) have been described and suggestions have been made to overcome the difficulties and to improve the reliability of the enzyme immuno assays.
Abstract: The major factors that limit the performance of enzyme-linked immunosorbent assays (ELISAs) have been described. Different variations have been explored for specific applications. Some of the common problems that are encountered while carrying out ELISAs have been highlighted. Suggestions have been made to overcome the difficulties and to improve the reliability of the enzyme immuno assays.
11Â citations
TL;DR: In this paper, a new family of polymeric binders for solid composite propellants is proposed, based on two component interpenetrating polymer networks (IPNs), which comprise two different polyurethanes based on hydroxy terminated polybutadiene and ISRO polyol interbenetrated with two different vinyl polymers, viz poly methyl methacrylate and polystyrene.
Abstract: A new family of polymeric binders for solid composite propellants is proposed, based on two component interpenetrating polymer networks (IPNs). These networks comprise two different polyurethanes based on hydroxy terminated polybutadiene and ISRO polyol interpenetrated with two different vinyl polymers, viz poly methyl methacrylate and polystyrene. the networks synthesized by the simultaneous interpenetrating technique have been characterized for their properties, such as stress-strain, density, viscosity, thermal degradation, and heat of combustion. Phase morphologies have been determined using electron microscopy. Suitable explanations have been adduced to rationalize the properties of IPNs in terms of their structures and chain interactions. A study of the mechanical properties and burning rates of the ammonium perchlorate (AP)-based solid propellant using the newly synthesised IPNs as binders, has been carried out. The results show that both mechanical strength and burning rate of solid propellants could be suitably modified by simply changing the nature and/or the ratio of the two interpenetrating polymer components.
11Â citations
TL;DR: In this article, the authors discuss the measurements of indoor radon in India by various groups and the important problems associated with the standardisation of these measurements, and the standardization procedure and the calibration set-up developed at this laboratory are also presented.
Abstract: Solid-state nuclear track detectors are being used to obtain the time integrated concentration levels of indoor radon/thoron and their daughters. This technique is preferred for taking such measurements in dwellings. Such measurements are important as the radiation dose to human beings due to indoor radon constitutes more than 50 per cent of the total dose including that received from the natural sources. Normalisation is necessary to obtain a representative value of the effective dose equivalent to the population. Indoor measurements carried out by several laboratories all over the country show that the indoor radon levels vary from 1.5 to about 2000 Bq m/sup -3/, while the normal level is in the range of 10 to 60 Bq m/sup -3/. It is rather difficult to compare the levels since the exposure conditions, the period of measurements and the calibration techniques used are not standardised. The present paper discusses the measurements of indoor radon in India by various groups and the important problems associated with the standardisation of these measurements. The standardisation procedure and the calibration set-up developed at this laboratory are also presented.
8Â citations
TL;DR: In this article, the influence of constant and transient radiant flux on the burning rate of solid propellants is considered and the validity of the equivalence principle for the radiant flux and increase in initial temperature and also the problem of possible photochemical effect of thermal radiation are discussed.
Abstract: The influence of constant and transient radiant flux on the burning rate of solid propellants is considered. The validity of the equivalence principle for the radiant flux and increase in initial temperature and also the problem of possible photochemical effect of thermal radiation are discussed. Experimental data on burning rate response to periodical perturbations of radiant flux for different types of solid propellants are reported. The problem of correlation between burning rate response to perturbations of pressure and external radiation is considered. Formulation of the problem on transient combustion in terms of the Zeldovich- Novozhilov phenomenological approach is described and the results of numerical integration are presented.
6Â citations
TL;DR: In this article, the authors evaluated the influence of the manner in which the armour plates are held during their ballistic testing on the performance of the armour and found that the way in which a plate is held during a test has a negligible influence on its performance.
Abstract: Influence of the manner in which the armour plates are held during their ballistic testing on the armour performance, has been evaluated. One armour plate was clamped rigidly to the test stand while a second plate of identical composition, hardness, and dimensions was hung loosely from the target holder. Both these plates were impacted with the same type of projectiles and over the same impact velocity range. The nature of ballistic damage evaluated indicates that the manner in which the armour is held during ballistic testing has a negligible influence on its performance at least when the mass of the plate is substantially higher than that of the projectile.
6Â citations
TL;DR: In this article, a flash x-ray system during the jet studies on 30, 60 and 90 mm shaped charges and the evaluation of jet characteristics parameters is presented. But the performance of these tests are difficult because of high speed of events that take place, production of intense light, smoke, debris, etc, and the large scale destruction caused.
Abstract: At present many antitank weapon systems are employing shaped charge warheads. It is, therefore, extremely important for a designer to avail of the methods capable of predicting performance of shaped charges, mainly to achieve maximum penetration. For this purpose, it is necessary to study the behaviour of the shaped charge during actual firing tests. These tests are difficult because of high speed of events that take place, production of intense light, smoke, debris, etc, and the large scale destruction caused. To overcome these difficulties, flash x-ray system during the jet studies on 30, 60 and 90 mm shaped charges and the evaluation of jet characteristics parameters.
6Â citations
TL;DR: In this article, the authors developed a methodology and software developed to reconstruct a vertical sound speed profile as a part of studies on the marine acoustic modelling, using the ray path lengths and the travel time perturbations in tomographic layers.
Abstract: The methodology and software developed to reconstruct a vertical sound speed profile as a part of studies on the marine acoustic modelling, using the ray path lengths and the travel time perturbations in tomographic layers are outlined For a stratified ocean, considering the range independent nature of the medium, geophysical inverse techniques are employed to reconstruct the sound speed profile The reconstructed profile for a six layer ocean, with five energetic modes, is in good agreement with that of the assumed profile thereby indicating the usefulness of the model The effect of noise caused by the excursions of the source and receiver moorings; When expressed in terms of travel-time differences, results in the sound speed changes up to 01 percent
6Â citations
TL;DR: In this paper, the effect of composite modified double base (CMBD) ingredients, double-base (DB) matrix (SNC:CL), and the effect on high energy materials like ammonium perchlorate (AP), cyclotrimethylene trinitramine(RDX), cycletetramethylene tetranitramine (HMX), and pentaerythritol tetranitrirate (PTN) on a CMDB system, have been studied.
Abstract: The shock sensitivities (viz, impact and friction) of composite modified double-base (CMBD) ingredients, double-base (DB) matrix (SNC:CL) and the effect of high energy materials like ammonium perchlorate (AP), cyclotrimethylene trinitramine(RDX), cyclotetramethylene tetranitramine (HMX) and pentaerythritol tetranitrate (PTN) on a CMDB system, have been studied. Individual ingredients of DB matrix, i.e., spheroidal nitrocellulose (SNC) and desensitised nitroglycerine (casting liquid (CL), do not appear to be very sensitive to impact and friction, impact of 36.0 kg each. Various DB mixtures gave impact ranging between 56.5 to 61.5 cm and friction insensitivity of 36.0 kg for all the formulations. But addition of AP to DB matrix increases the impact and friction sensitivity tremendously, impact ranging from 15 to 24 cm and friction from 2.0 to 3.2 kg. Sensitivity-wise addition of RDX, HMX, and PETN to DB matrix follows AP while the addition of Al slightly reduces the sensitivity.
TL;DR: In this paper, the geomagnetic field was used as a rigidity filter for the energetic charged particles, and the upper limit on their ionization states was obtained by using the relation Z <= M.p.c/R/sub c.
Abstract: Ionization states of 16 individual anomalous cosmic ray events have been determined in the anuradha cosmic ray experiment conducted onboard Spacelab-3. The geomagnetic field was used as a rigidity filter for the energetic charged particles, and the upper limit on their ionization states is obtained by using the relation Z <= M.p.c/R/sub c/. Out of 16 events, 11 are found to be singly ionized and the other five events are consistent with their being in singly ionized states. The singly ionized nature of the anomalous cosmic ray particles suggests neutrals in the local interstellar space as their source.
TL;DR: In this article, the registration and development of fission fragments emitted from /sup 252/Cf source have been carried out in three different polycarbonate detectors and the detectors have been characterised in terms of bulk etch rate and its behaviour.
Abstract: Registration and development of fission fragments emitted from /sup 252/Cf source have been carried out in three different polycarbonate detectors. The detectors have been characterised in terms of bulk etch rate and its behaviour. Maximum etchable cone lengths have been compared with the theoretically computed values. Identification of the fission fragments in terms of their mass and charge has been done with the help of the computer programme 'FFR'.
TL;DR: In this paper, molecular sieve (MS) over zirconium silicate (ZrSiO/sub 4/) was used as the stabilizer for a composite modified double base (CMDB) system.
Abstract: Stability test results and DTA studies indicate the superiority of molecular sieve (MS) over zirconium silicate (ZrSiO/sub 4/) as the stabilizer for a composite modified double base (CMDB) system. Shelf life as computed from autoignition test results was 30 years for MS-based composition which is almost double the life of ZrSiO/sub 4/, but approximately half the life of resorcinol-based composition which was used as a reference. Higher stabilizing effect of MS as compared to ZrSiO/sub 4/ has been explained on the basis of the presence of channels and cavities in its structure, which makes it an effective adsorbent for decomposition catalysing species. Poor stabilization capability of m-dinitrobenzene as compared to resorcinol suggests the catalytic involvement of acidic decomposition products of nitrate esters in autodecomposition process of CMDB propellants.
TL;DR: In this paper, the authors evaluated the performance of nornornadiene and carene with red fuming nitric acid (RFNA) as oxidiser for a 10 kg/sub f/ thruster at a chamber pressure of around 20 atm, using 21 per cent N/sub 2/O/sub 4/ by weight.
Abstract: The fuel blends of nornornadiene and carene (50:50 by weight) and norbornadiene, carene and cardanol (40:40:20 by weight) exhibit synergistic hypergolic ignition with red fuming nitric acid (RFNA) as oxidiser. These fuel blends have been evaluated by theoretical calculations of performance parameters and subsequently verified by static firing in a 10 kg/sub f/ thruster at a chamber pressure of around 20 atm, using RFNA (with 21 per cent N/sub 2/O/sub 4/ by weight) as oxidiser. The theoretical calculations show maximum specific impulse and C*values at the O/F, 3 to be 227.8 s and 1598.7 m/s respectively for the norbornadiene-carene blend. The corresponding values for the norbornadiene, carene and cardanol blend were found to be 226.8 s and 1586.0 m/s respectively at the O/F, 4. For theoretical calculations, the chamber pressure (P/sub c) and the exit pressure (P/sub e/0 were assumed to be 20 and 1 atm, respectively. The static firing of the propellants in a 10 kg thruster exhibited smooth pressure-time curves with the experimental C* values in close agreement with those calculated and the non-deposition of carbon in the nozzle. This indicated low combustion instability and high combustion efficiency under rocket conditions (> 0.9). The fuel blends with their low cost and toxicity and relatively high density can replace G-fuel used in several Indian missiles without impairing the performance.
TL;DR: In this article, hydroxyl-terminated natural rubber (HTNR)-based Mg and Mg-Al alloy-filled polyurethane systems were developed for air-breathing propulsion.
Abstract: Development of fuel rich propellants for air-breathing propulsion is one of the frontier areas of research. This carries less oxidiser than the normal propellants, uses ram air for complete combustion and is heavily metallised. Studies were conducted at VSSC for the development of hydroxyl-terminated natural rubber (HTNR)-based Mg and Mg-Al alloy-filled polyurethane systems. The HTNR prepolymer was modified to make it free of acid functionality so as to avoid reaction with the metals and was then reacted with calculated amount of propylene oxide in the presence of tertiary amine catalyst at room temperature. Various levels of Mg and Mg-Al alloy were used in different compositions and the effect on propellant characteristics was studied. TMP and butane diol were used for higher crosslinking, chain extension, etc and their effects were evaluated. Propellant compositions using 30-35 per cent by weight of Mg/Mg-Al alloy with the modified prepolymer have been developed. They exhibit good processibility and mechanical properties. The feasibility of room temperature curing was attempted. Motors weighing 2 kg with 100 mm OD and 200 mm length were successfully static-tested in the primary mode for performance evaluation.
TL;DR: In this article, the results of burning rate calorimetry, explosion temperature and the sensitivity data of some delay compositions containing bismuth chromate were presented for impact and friction sensitivity tests to determine the safety aspects.
Abstract: Barium chromate is used as a secondary oxidiser in delay compositions which slows down the rate of the reaction. The composition containing barium chromate potassium perchlorate and sulphur along with the binder, gives inverse burning rates up to 4.5 s/cm. If barium chromate is substituted by bismuth chromate hydrate, the rate of reaction is slowed down further to 11.8 s/cm. Various compositions were prepared by changing the percentage of barium chromate and bismuth chromate. The energy of activation was determined to be 14.5 kcal/mole for the composition with 40 per cent bismuth chromate. The explosion temperature for a delay of 5 s was observed as 480 degree centigrade. These compositions were subjected to impact and friction sensitivity tests to determine the safety aspects. This paper presents the results of burning rate calorimetry, explosion temperature and the sensitivity data of some delay compositions containing bismuth chromate.
TL;DR: Prolonged Vit C therapy as well as waterbath rewa-rming at body temperature immediately after cold exposure showed significant reduction in tissue damage and high dose of Vit C Therapy precedetl by rapid rewarming showed additional benefit in reducing the tissue loss.
Abstract: Two series of experiments were conducted on rats to evaluate the effect of Vit C for prevention and treatment of frostbite. For studies on prevention, 45 rats were divided into 3 groups, as control, Vit C-short term and Vit C-long term. Frostbite was produced experimentally in both the hind limbs by exposing the animals at -15 degree centigrade for 1 h and the assessment of cold injury was done after 15 days. In another study on prevention, frostbite was produced on 20 rats twice, in each limb separately with and without Vit C therapy. The result showed that administration of Vit C for a short period prior to cold exposure period maintained higher rectal temperature and significantly reduced the incidence of frostbite. For studies on treatment, frostbite was produced experimentally in 4 groups of rats. Group I was treated as control, group II was administered 5 mg of Vit C/100 g bw (orally) daily for 15 days. rapid rewarming at 37 degree centigrade on the exposed limbs of group III animals was carried out immediately after cold exposure. Combination of rapid rewarming followed by C therapy was given to group IV. The degree of injury of various groups were compared statistically. Prolonged Vit C therapy as well as waterbath rewarming at body temperature immediately after cold exposure showed significant reduction in tissue damage. High dose of Vit C therapy preceded by rapid rewarming showed additional benefit in reducing the tissue loss.
TL;DR: In this paper, the convective magnetohydrodynamic flow past a uniformly moving infinite vertical plate, with the magnetic field and the suction velocity applied normal to the plate has been analyzed.
Abstract: The convective magnetohydrodynamic flow past a uniformly moving infinite vertical plate, with the magnetic field and the suction velocity applied normal to the plate has been analysed. Presence of heat source or sink has also been considered. The findings are expected to throw light on some problems of defence applications in the areas of aeronautical designs and also flow and heat transfer problems of a chemically reacting fluid.
TL;DR: In this article, the new theory of shock dynamics proposed by Ravindran and Prasad has been considered with initial values taken from the similarity solution for a single conservation equation and the results have been compared with those obtained by Lax-Wendroff finite difference method.
Abstract: The new theory of shock dynamics proposed by Ravindran and Prasad has been considered with initial values taken from the similarity solution for a single conservation equation and the results have been compared with those obtained by Lax-Wendroff finite difference method.
TL;DR: The trace contents of uranium have been estimated in some edible and commercial plants by PTA method as mentioned in this paper, the groups of food plants studied are cereals, pulses, underground vegetables, leafy vegetables, and fruit vegetables.
Abstract: The trace contents of uranium have been estimated in some edible and commercial plants by PTA method. The groups of food plants studied are cereals, pulses, underground vegetables, leafy vegetables, and fruit vegetables. The commercial plants and ingredients taken are betel leaves, tobacco leaves, areca nuts, and lime. Among the different samples studied, the average uranium content, in general, is found to vary from 0.25 to 2.67 ppm
TL;DR: In this paper, the combustion phenomena of Mg-NaNO/sub 3/ propellants have been studied and the results of burning rate at different mixture ratios and particle sizes indicate that the compositions containing finer particle size (50 millimicron) NaNO/Sub 3/ give higher burning rate with high fuel content of the mixture than at the stoichiometric ratio; whereas the compositions with coarser particle size NaNO /sub 3 / propellants show increasing burning ratio with increasing oxidiser content and give a maximum at stoichiometrical point.
Abstract: The combustion phenomena of Mg-NaNO/sub 3/ propellants have been studied. Results of burning rate at different mixture ratios and particle sizes indicate that the compositions containing finer particle size (50 millimicron) NaNO/sub 3/ give higher burning rate at high fuel content of the mixture than at the stoichiometric ratio; whereas the compositions with coarser particle size (250 millimicron) NaNO/sub 3/ show increasing burning rate with increasing oxidiser content and give a maximum at stoichiometric point. Thermal decomposition results indicate that the condensed phase heat release at the propellant surface and the reactions in the vapour phase are responsible for variations in the burning rate. The decomposition products of finer size NaNO/sub 3/, react with Mg before Mg particles acquire sufficient energy for ignition, and lead to condensed phase heat release. This heat is maximum at high fuel content and causes high burning rate with low pressure and temperature sensitivity. The increase in the oxidiser content reduces the condensed phase heat due to formation of metal agglomerates and causes lower burning rate with high pressure and temperature sensitivity. After the Mg particles acquire sufficient energy for ignition the decomposition products of coarser size NaNO/sub 3/ diffuse out along with Mg and react in the vapour phase. This causes an increase of burning rate with increase in the oxidiser content of the mixture up to the stoichiometric ratio with a pressure and temperature dependence.
TL;DR: Treatment with atropine along with carbamates further enhanced significantly the survival time against DFP poisoning and pyridostigmine pretreatment did not produce any significant effect on survival time either against D FP or sarin intoxication.
Abstract: Investigates the effects of two well-known carbamates, physostigmine and pyridostigmine against organophosphorous compound and nerve gas toxicity. Physostigmine pretreatment for 30 min enhanced the survival time of rats against DFP intoxication whereas it did not have any effect with sarin poisoning. However, pyridostigmine pretreatment did not produce any significant effect on survival time either against DFP or sarin intoxication. Treatment with atropine along with carbamates further enhanced significantly the survival time against DFP poisoning.
TL;DR: In this article, an attempt has been made to develop cellulose nitrate films for their use in solid state nuclear track detectors (SSNTD) for estimating radon, thoron and their daughter products in the environment.
Abstract: Solid state nuclear track detectors (SSNTDs) have been recognised by IAEA as a standard method for estimation of radon, thoron and their daughter products in the environment. The detectors that are commonly used in environmental monitoring are generally made from cellulose nitrate (LR-115) and polycarbonates (CR-39). In view of the non-availability of these detectors in India, need was felt to develop them indigenously. Accordingly, an attempt has been made to develop cellulose nitrate films for their use in SSNTD. Cellulose nitrate with a particular nitrogen content was used for preparing these films by a cast method. This films were annealed, evaluated and then compared with imported films. The background track density and alpha track density after exposure to 150 nCi of /sup 241/Am source at 2.5 cm distance were found to be comparable with those of imported films.
TL;DR: In this paper, an experimental study of cook-off of CCC was carried out by hot plate technique and the results showed that out of four types of coatings, two gave better results.
Abstract: Combustible cartridge case (CCC) offers specific advantages over the conventional metallic (brass) case. The CCCs are made of cellulose fibres with suitable explosives to ensure debris-free combustion inside the gun barrel. The presence of explosives in CCC, however, causes increased vulnerability to cook-off. An experimental study of cook-off of CCC was carried out by hot plate technique. Cook-off data for CCC of different compositions and with various cook-off delay coatings was measured. It was found that out of four types of coatings, two gave better results.
TL;DR: An exact analysis of the effects of unsteady two-dimensional free convective flow during the motion of a viscous incompressible through a highly porous medium was undertaken in this paper.
Abstract: An exact analysis of the effects of unsteady two-dimensional free convective flow during the motion of a viscous incompressible through a highly porous medium was undertaken. The porous medium is bounded by a vertical plane surface of constant temperature. The surface absorbs the fluid with a constant velocity and the free stream velocity of the fluid vibrates at a mean constant value. The analytical expressions for the velocity of the fluid are presented in the paper. The effects of rotation and permeability parameters on the axial and transverse components of velocity are discussed with the help of graphs.
TL;DR: In this article, the authors reviewed thermal propulsion systems related to underwater application, covering the conceptual idea, the technology and the mechanism, and some of the salient features of the stored chemical energy propulsion system (SCEPS) technology and unconventional engines are discussed.
Abstract: This study reviews thermal propulsion systems related to underwater application, covering the conceptual idea, the technology and the mechanism. Some of the salient features of the stored chemical energy propulsion system (SCEPS) technology and the unconventional engines are discussed. While these systems have generated considerable interest in the west, they are still new in India.
TL;DR: In this paper, the authors used CR-39 films for evaluation of neutron shielding of metal alloys, different types of rubbers, sand polymers, etc. The results seem to be in agreement within approximate 10 per cent variation.
Abstract: CR-39 films have been used for evaluation of neutron shielding of metal alloys, different types of rubbers, sand polymers, etc. These films have been chosen because of their ability to record fast neutrons from 200 keV-10 MeV and their insensitivity to gamma radiations. Tenth value layer (TVL) for the materials studied varies from 10.5 to 28.6 cm. In addition, the values of TVL have also been computed for standard material, such as Al, steel, etc. Using neutron removal cross-section data, the results have been compared with those of experimentally determined values. The results seem to be in agreement within approximate 10 per cent variation.
TL;DR: In this paper, a new concept of variable mass preformed fragmented (VMPF) warhead was introduced and a philosophy was evolved for the VMPF-type missile warheads.
Abstract: Fragment hit density and hit probability of the warhead are the critical parameters in the selection of a preformed fragment-type missile warhead against ground targets. Hence these factors are to be maximised. The parametric studies of these factors have lead to a new concept of variable mass preformed fragmented (VMPF) warhead. A philosophy was evolved for the VMPF-type missile warheads. A computer software for generating the external configuration of the VMPF-type missile warhead was developed and basic algorithm is discussed in this paper. With this new design approach, the fragment hit density and hit probability were improved considerably in the shorter ranges, when compared to that of a uniform mass preformed fragmented warhead of conventional design.
TL;DR: The optimum dosage of this biocide for prevention of bioactivity in aviation turbine fuel has been studied by the specified qualitative performance tests after 18 months storage of the inhibited fuel under accelerated conditions of temperature and humidity as discussed by the authors.
Abstract: Addition of ethylene glycol monoethyl ether, an anti-icing fuel additive supports microbial growth when added to aviation turbine fuel in low dosages. however, increases in its concentration to certain limits effectively prevents bioactivity in the fuel. The optimum dosage of this biocide for prevention of bioactivity in aviation turbine fuel has been studied by the specified qualitative performance tests after 18 months storage of the inhibited fuel under accelerated conditions of temperature and humidity.