“Mathematical Modelling and Numerical Investigation of Scram Jet Engine with Multistage Wall Injector Using Fluent”

mechanical

Fuel injection technology in Scramjet engines is an area that is still evolving today. The fuel used by a scramjet is usually liquid or gas. Efficient combustion requires the mixing of fuel and air in approximately stoichiometric ratios. The main problem of scramjet fuel injection is that the airflow is quite fast, meaning that there is a minimum time for fuel to mix with air and ignite to produce thrust (essentially milliseconds). Main fuel used for combustion is hydrogen. Hydrocarbons present more challenges than hydrogen due to greater ignition delays and the need for more advanced mixing techniques. Increasing the mixture, and thus reducing the length of the comb, is an important aspect in designing a scramjet engine. Several techniques are used today for fuel injection in a Scramjet engine. In Present study we Investigate Scramjet engine with multi stage wall injector, various mass flow rate and micro gravity effect by the CFD Simulation using ANSYS as a CAE tool. Simulation results CFD Simulation results show an excellent stable flow phenomenon of the complete system which is the desirable stream function for the accuracy of the results. Present study shows that in MSWI (Multi stage wall injector) , the ALPHA angle which is in between sidewall and injecting surface is play a major role in combustion. In present study we have used 30, 45 and 60 degrees for the wall injector and simulation results shows that as we increase the angle combustion efficiency is increased and emission is decreased for the system.

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