FIELD: engines and pumps.SUBSTANCE: circular combustion chamber of a gas turbine engine comprises an outer wall and an inner wall connected by a wall forming a chamber base. These walls limit furnace spaces, the axis of which is inclined relative to the chamber axis. In the wall of the chamber base, having the form of the truncated cone, there are holes drilled, design for fuel injection systems. Planes of holes are perpendicular to axes of these furnace spaces. Deflectors of thermal protection aligned relative to each hole comprise a flat collar, by means of which they rest against a section of a flat surface around the circumference of holes. The walls of the chamber base is made of one sheet along the perimetre of the combustion chamber and is represented by the sequence of bordering flat faces, forming one common board. Each face has a hole. The collar of the deflectors rests against the bearing surface of the faces.EFFECT: provision of deflectors fixation on a wall of a combustion chamber with a small distance between holes for fuel injection systems.9 cl, 9 dwg

Circular combustion chamber of gas turbine engine

FIELD: chemistry.SUBSTANCE: invention can be used for semiquantitative manganese (II) and copper (II) determination in aqueous solutions, in particular in natural and waste waters under field conditions. The method comprises filling of a glass tube with an inner diameter of 0.5 cm with Na- form of macroreticular carbonaceous resin "КБ-2Э-16" based on polymethacrylate diethylene glycol divinyl ether, followed by filling with the sample solution. At that, at the first stage, copper (II) is determined visually along the length of the coloured resin area at a pH of about 4.5 and ionic strength of 0.1 (NaNO) of the analyzed solution. At the second stage, after solution passage, manganese (II) is determined along the length of the coloured resin area which appears with the addition of formaldoxime complexing agent and NaOH to the indicator tube to create pH ~10.EFFECT: method reduces complexity, reduces the amount of reagents and time of analysis for copper and manganese determination in an aqueous solution under field and laboratory conditions.2 dwg, 1 ex

Method for copper (ii) and manganese (ii) determination by indicating tube in case of their joint presence in solutions for natural waters analysis

FIELD: chemistry.SUBSTANCE: invention relates to analytical chemistry of rare elements, namely rhenium (VII) and may be used for determination of rhenium in waste water, lean solutions, alumo-platinum-rhenium and alumo-rhenium catalysts, and geological materials. The method involves preparation of rhenium (VII) solution, reduction to rhenium (IV) using tin chloride (II) solution, converting into a complex compound, separation adsorbent from the solution, measurement of diffuse reflectance factor at 510 nm and determination of rhenium (IV) using an analytical curve. Silica, chemically modified with N-(1,3,4-thiadiazole-2-thoil)-N'-propyl-urea groups is used as an adsorbent.EFFECT: reduced relative detection limit, extended range of detectable concentrations.

Method for photometric determination of rhenium (vii)

FIELD: engines and pumps.SUBSTANCE: gas-turbine engine with annular combustion engine includes on its inlet end an annular bottom of the chamber, through which fuel spray devices pass, and the outlet end of which is fixed by means of flexible annular flanges on radially located internal and external casings. Inlet end of chamber is connected at least to internal or external casing by means of elastically deformed bridges distributed around combustion chamber. Each of elastically deformed bridges is made in the form of bent spring plate located in circumferential direction. Besides, bridges are fixed with a bolt connection on one of internal and external casings and supported in radial direction from chamber bottom, or vice versa.EFFECT: simpler design of gas-turbine engine with simultaneous absorption and dampening of vibrations.18 cl, 11 dwg

Gas-turbine engine with annular combustion chamber

FIELD: chemistrySUBSTANCE: invention relates to analytical chemistry of elements, specifically to methods of determining concentration of palladium and can be used during determination thereof in process solutions and industrial water Method involves preparing a sorbent and solution of palladium (II), extraction of palladium (II) from a solution of sorbent, conversion thereof into a complex compound on surface of sorbent, separating sorbent from solution, measurement of colour intensity of palladium (II) surface complex and determining content of palladium (II) using a calibration curve Sorbent used is silica, successively modified with polyhexamethylene guanidine and 2-nitroso-1-naphthol-4-sulphonic acid (nitroso-H-salt), and diffuse reflection factor is measured at 550 nmEFFECT: use of method provides high-accuracy determination of content of palladium (II) in solutions1 cl, 3 ex

Method of determining palladium (ii)

FIELD: analytical methods. ^ SUBSTANCE: invention aims at determining gold(III) in aqueous solutions, in particular in effluents and production solutions. To that end, indicator composition for determining gold(III), which contains anionite AN-25 as sorbent, 2.0%, tin(II) as reagent, 10%, and water, sorbent is preliminarily saturated with gold(III) thiocyanate complexes. ^ EFFECT: enabled determination of gold(III) using harmless solvents and reduced determination time. ^ 4 tbl

Indicator composition for determining gold(iii) in aqueous solutions

FIELD: analytical chemistry, detection of palladium ( II ) in sewage and industrial solutions SUBSTANCE: proposed indicator composition to detect Pd ( II ) in aqueous solutions contains nitric acid, nitroso-R-salt, water and sorbent- anionite AHC-80 with following proportion of components, per cent by mass: anionite AHC-80 04; nitric acid 0001; nitroso-R-salt 04; water being the balance EFFECT: expanded line range of detected concentrations of palladium ( II ) in aqueous solutions, raised sensitivity and improved selectivity of method 3 tbl

Indicator composition to detect palladium ( ii ) in aqueous solutions

analytical chemistry (indicator compounds), applicable for determination of rhenium (VII) in aqueous solutions, in particular, in sewage and process solutions. SUBSTANCE: the indicator compound for determination of rhenium (VII) in aqueous solutions contains potassium thiocyanate, hydrochloric acid, tin chloride (II) and water, in addition it contains sorbent-anionite at the following relation of components, percent by mass: anionite - 0.55; potassium thiocyanate - 1.07; tin chloride (II) - 0.52; hydrochloric acid - 3.02; water - the rest. EFFECT: expanded linear range of the determined contents of rhenium (VII) in aqueous solutions, enhanced sensitivity and improved selectivity. 2 tbl

Indicator compound for determination of rhenium (vii) in aqueous solutions

FIELD: analytical methods. ^ SUBSTANCE: in indicator composition for determining manganese(II), in particular, in waste waters and production solutions, containing 0.6% of sorbent, 0.05% of reagent, medium pH adjusting substance, and water, said sorbent is sulfate-form anionite (AN-31), said reagent is 4-(2-pyridylazo)resorcinol, and pH of medium is adjusted with 0.0035-0.004% of ammonia. Concentration of Mn2+ ions is measured spectrophotometrically in presence of above-defined indicator. ^ EFFECT: increased determination selectivity and accelerated analytical procedure. ^ 3 tbl

Indicator composition for determining manganese(ii) in aqueous solutions

FIELD: analytical methods. ^ SUBSTANCE: indicator composition, which is used two-step analytical procedure, contains 0.6% anionite AN-31 in sulfate form (as sorbent), 0.05% 4-(2-pyridylazo)resorcinol (reagent), 0.098-0.1% sulfuric acid as pH-creating reagent in the first step, which is neutralized in the second step with excess (0.0035-0.004%) aqueous ammonia to pH 9. Method can be, in particular, used for assaying waste waters and industrial solutions. ^ EFFECT: enabled joint determination of the two ions, improved selectivity of analysis, and accelerated analytical procedure. ^ 3 tbl

Kholmogorov A G

Papers

Indicator composition for determining gold(iii) in aqueous solutions

Indicator composition to detect palladium ( ii ) in aqueous solutions

Indicator compound for determination of rhenium (vii) in aqueous solutions

Indicator composition for determining manganese(ii) in aqueous solutions

Indicator composition for joint determination of copper(ii) and manganese(ii) in aqueous solutions