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Vasudevan Raghavan

Bio: Vasudevan Raghavan is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Combustion & Laminar flow. The author has an hindex of 17, co-authored 130 publications receiving 1051 citations. Previous affiliations of Vasudevan Raghavan include University of Nebraska–Lincoln & Indian Institutes of Technology.


Papers
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Journal ArticleDOI
TL;DR: In this paper, a fundamental experimental study to determine the burning rates of ethanol and ethanol-blended fossil fuels is presented, where pure liquid ethanol or its blends with liquid fossil fuels such as gasoline or diesel, has been transpired to the surface a porous sphere using an infusion pump.

54 citations

Journal ArticleDOI
TL;DR: In this paper, experimental and numerical investigations of spheres burning in a convective environment have been carried out using a finite volume technique based on non-orthogonal semi-collocated grids.

51 citations

Journal ArticleDOI
TL;DR: In this article, the interaction of micron-sized coal particles entrained into lean methane-air premixed flames was investigated and the effects of different coal dust concentrations (10−300g/m 3 ) entrained in the mixture of methane-Air at three lean equivalence ratios, ϕ, of 0.75, 0.80 and 0.85, on the laminar burning velocity were studied experimentally.

51 citations

Journal ArticleDOI
TL;DR: In this paper, the evaporation characteristics of pine oil droplet were studied through suspended droplet experiment so as to get better insights on pineoil droplet evapuration at various temperatures.

44 citations

Journal ArticleDOI
TL;DR: In this article, a two-phase numerical simulation of transient vaporization of a moving spherical water droplet is presented to study the evaporation characteristics of moving water droplets under conditions typically observed in nuclear reactor during a loss of coolant accident.

42 citations


Cited by
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Book ChapterDOI
30 Dec 2011
TL;DR: This table lists the most common surnames in the United States used to be Anglicised as "United States", then changed to "United Kingdom" in the 1990s.
Abstract: OUTPU T 29 OUTPU T 30 OUTPU T 31 OUTPU T 32 OUTPU T 25 OUTPU T 26 OUTPU T 27 OUTPU T 28 OUTPU T 21 OUTPU T 22 OUTPU T 23 OUTPU T 24 OUTPU T 17 OUTPU T 18 OUTPU T 19 OUTPU T 20 OUTPU T 13 OUTPU T 14 OUTPU T 15 OUTPU T 16 OUTPU T 9 OUTPU T 10 OUTPU T 11 OUTPU T 12 OUTPU T 5 OUTPU T 6 OUTPU T 7 OUTPU T 8 OUTPU T 1 OUTPU T 2 OUTPU T 3 OUTPU T 4 29 30 31 32 25 26 27 28 21 22 23 24 17 18 19 20 13 14 15 16 9

1,662 citations

Journal ArticleDOI
TL;DR: In this paper, an attempt has been made to review the different approaches and techniques used to generate biodiesel from Jatropha curcas oil and the main factors affecting the biodiesel yield, for example the molar ratio of alcohol to oil, catalyst concentration, reaction temperature and reaction time are discussed.
Abstract: The demand for petroleum has risen rapidly due to increasing industrialization and modernization of the world. This economic development has led to a huge demand for energy, where the major part of that energy is derived from fossil sources such as petroleum, coal and natural gas. However, the limited reserve of fossil fuel has drawn the attention of many researchers to look for alternative fuels which can be produced from renewable feedstock. Biodiesel has become more attractive because of its environmental benefits and it is obtained from renewable resources. There are four primary methods to make biodiesel: blending, microemulsion, pyrolysis and transesterification. The most commonly used method is the transesterification of triglycerides (vegetable oil and animal fats) with alcohol in the presence of a catalyst. There is a growing interest in using Jatropha curcas L. oil as the feedstock for biodiesel production because it is non-edible and thus does not compromise the edible oils, which are mainly used for food consumption. Non-edible oils are not suitable for human consumption because of the presence of toxic components. Further, J. curcas L. seed has a high content of oil and the biodiesel produced has similar properties to that of petroleum-based diesel. In this paper, an attempt has been made to review the different approaches and techniques used to generate biodiesel from Jatropha curcas oil. The main factors affecting the biodiesel yield, for example the molar ratio of alcohol to oil, catalyst concentration, reaction temperature and reaction time are discussed. Lastly, the environmental considerations and economic aspects of biodiesel are also addressed.

524 citations

Journal ArticleDOI
Yanan Gan1, Li Qiao1
TL;DR: In this article, burning characteristics of fuel droplets containing nano and micron-sized aluminum particles were investigated, and five distinctive stages (preheating and ignition, classical combustion, microexplosion, surfactant flame, and aluminum droplet flame) were identified.

324 citations

01 Apr 1997
TL;DR: A detailed chemical kinetic model has been used to study dimethyl ether (DME) oxidation over a wide range of conditions, such as jet-stirred reactor (JSR) at I and 10 atm, 0.2 < 0 < 2.5, and 800 < T < 1300 K.
Abstract: A detailed chemical kinetic model has been used to study dimethyl ether (DME) oxidation over a wide range of conditions. Experimental results obtained in a jet-stirred reactor (JSR) at I and 10 atm, 0.2 < 0 < 2.5, and 800 < T < 1300 K were modeled, in addition to those generated in a shock tube at 13 and 40 bar, 0 = 1.0 and 650 :5 T :5 1300 K. The JSR results are particularly valuable as they include concentration profiles of reactants, intermediates and products pertinent to the oxidation of DME. These data test the Idnetic model severely, as it must be able to predict the correct distribution and concentrations of intermediate and final products formed in the oxidation process. Additionally, the shock tube results are very useful, as they were taken at low temperatures and at high pressures, and thus undergo negative temperature dependence (NTC) behavior. This behavior is characteristic of the oxidation of saturated hydrocarbon fuels, (e.g. the primary reference fuels, n-heptane and iso- octane) under similar conditions. The numerical model consists of 78 chemical species and 336 chemical reactions. The thermodynamic properties of unknown species pertaining to DME oxidation were calculated using THERM.

280 citations

Journal ArticleDOI
15 May 2017-Fuel
TL;DR: The most recent developments in the modelling of heating and evaporation of fuel droplets, the results of which were published in 2014-2017, are reviewed, and the most important unsolved problems are identified.

267 citations