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Numerical Study on Supersonic Mixing Enhancement with a Ramp Injector and a Cavity
Fumihiko NISHIMOTO,Kohei YAMAGUCHI,Shigeru ASO,Yasuhiro TANI 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
In the present study, supersonic mixing enhancement has been investigated computationally for a SCRAM-jet engine model combustor with a swept ramp injector and a cavity. The calculation condition of the main stream are Ma = 3.96, total pressure 1.27 MPa and total temperature 283 K. In order to enhance the mixing among fuel and air a cavity is placed downstream of the ramp injector. The position and geometry of the cavity plays an important role in mixing efficiency. Therefore L/D and the Length from the ramp to the cavity have been varied. From numerical results. the mixing efficiency was the highest when L/D =2, but the total pressure loss was also the highest compared to L/D= 1,3 and 4.