The combustion mechanism of stoichiometric hydrogen-air mixture is modeled by a three-dimensional Navier-Stokes turbulence model with a one-step reduced chemical kinetic reaction model using ANSYS Fluent software. The detonation tube contains obstacles with various blockage ratios of 0.5, 0.6 and 0.7 ...
Hydrogen aircraft using a fuel cell design are zero emission in operation, whereas aircraft using hydrogen as a fuel for a jet engine or an internal combustion engine are zero emission for CO2 (a greenhouse gas which contributes to global climate change) but not for NOx (a local air pollutant...
Large eddy simulations (LES) have been performed to investigate the flow and combustion fields in the scramjet of the German Aerospace Center (DLR). Turbulent combustion is modeled by the tabulated thermo-chemistry approach in combination with the presumed probability density function (PDF). A β ...
Two-zone combustors were applied to improve combustion stability and preburners with jet-swirl injectors for large engines had been developed. Recently, the... Seong-up,MOON,Ilyoon,... - 《Current Industrial & Technological Trends in Aerospace》 被引量: 0发表: 2017年 加载更多来源...
I have been modelling hydrogen-air supersonic combustion..The axial position of maximum temperature is supposed to be closer to the burner exit by imparting swirl.But Iam observing it to be more distant after convergence of the solution.Can anyone explain what could be the reason? Iam using RN...
I want to simulate turbulent combustion using the k-epsilon turbulence model in a spark-ignition engine. I wanted to use a reduced chemical mechanism, so that the computational time will be reduced and less equations will be solved, without the results to be bad. But I am confused, because...
A short mechanism consisting of seven elementary reactions, of which only three are reversible, is shown to provide good predictions of hydrogen–air lean-flame burning velocities. This mechanism is further simplified by noting that over a range of conditions of practical interest, near the lean fl...
Ammonia is a carbon-free fuel and its application to internal combustion engines is expected. However, few studies on ammonia flames, especially at high pr... A Hayakawa,T Goto,R Mimoto,... - 《Mechanical Engineering Journal》 被引量: 10发表: 2015年 Structure, Chemical Mechanism and Propert...
A miniature double-layer disc-combustor with porous medium and Swiss-roll preheated channel, which can act as a miniature heat source, is proposed in this study, and the lean premixed flame behavior and thermal performance of 60% H2-40% CH4-air mixture in the case of various combustion ...
In order to support the development of a novel linear engine generator (LEG), the characteristics of ammonia/hydrogen premixed combustion are studied by using a detailed chemical kinetics mechanism. The ammonia combustion mechanism is identified among se