WSEAS Transactions on Fluid Mechanics
Print ISSN: 1790-5087, E-ISSN: 2224-347X
Volume 9, 2014
Modeling of Combustion in Engines Fed by Hydrogen
Authors: , , ,
Abstract: Computer aided design of new effective and clean hydrogen engines needs mathematical tools for supercomputer modeling of hydrogen – oxygen components mixing and combustion in rocket or aviation engines. The paper presents the results of developing verification and validation of mathematical model making it possible to simulate unsteady processes of ignition and combustion in RAM or pulse detonation engines. One of peculiarities of hydrogen-oxygen rocket engine is the following. On injecting liquid components fuel (hydrogen) having must lower critical temperature comes pre-evaporated and pre-heated in combustion chamber, while oxygen could be liquid then evaporating inside the chamber. Thus contrary to most types of engines hydrogen engine has an inverse mixture entering combustion chamber, in which fuel is gaseous and oxidant is liquid. Onset of detonation being very dangerous for classical RAM engines could, however, serve the basis for creating new generation of engines - pulse detonating engines (PDE). For this issue the problems of detonation onset and deflagration to detonation transition should be simulated quite accurately, because these processes strongly depend on inlet conditions, mixture composition and geometrical characteristics of combustion chamber.
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Keywords: Combustion, ignition delay, non-equilibrium, diffusion, turbulence, mathematical simulation
Pages: 154-167
WSEAS Transactions on Fluid Mechanics, ISSN / E-ISSN: 1790-5087 / 2224-347X, Volume 9, 2014, Art. #14