Reseach Of Increasing Mixture In Supersonic Combustion Ramjet Engine Combustors

The scramjet is a new type of air-breathing Propulsion device,which has remarkable performance and great potential superiority,and has a good prospect in the field of military aviation in the future. Cavities have gained the attention of this ramjet community as a promising flame holding device; computations are done on the increasing mixture of scramjet.Through the use of SSTκ-ωturbulence model of cavity flow numerical simulation results show that: use the SSTκ-ωturbulence model of compression amendments and transonic amendment has a high precision, can get the whirlpool, the shear layer separation and re-attachment, and other phenomena, the calculated pressure of cavity wall in good agreement with experimental results. In order to have a better enhance of the cavity mixed results, in this paper, design a herringbone head cavity, and do lots of comparative study between herringbone head cavity and flat head cavity. The results showed that there is a vortex flow follow flow direction in herringbone head cavity, and increasing air mixture.Finally calculated results of injected hydrogen in front of cavity show that: compare with flat head cavity, herringbone head cavity have a better mixture result. This is because there is a vortex flow follows flow direction in herringbone head cavity, and Large quantities of air involved in hydrogen group. Enhanced air - hydrogen mixed results, we reached the numerical simulation purposes.