高雷诺数超声速混合层标量输运与扩散特性研究进展

围绕超声速混合层标量混合在组合循环发动机中的应用,综述了超声速混合层以及超声速混合层标量混合过程的国内外研究进展,并针对高雷诺数超声速混合层标量输运与扩散特性研究中存在的不足提出解决办法,指出该领域值得深入开展的研究方向。

Scalar transport and diffusion study progress of supersonic mixing layer with high Reynolds number

The mixing processes of fuel-rich gas and air in the combustor of combined cycle engine was viewed as the supersonic mixing layer which was featured by the high Reynolds number. Moreover, the transport and diffusion processes of scalars including temperature and concentration were important factors for controlling the gas-gas mixing and combustion process. Under high Reynolds number, the turbulence scale, the transport and diffusion of scalar, vortex shape and scalar interfacial area of the mixing flow field revealed more complex physical mechanisms. In this paper, the application background of the scalar mixing in the supersonic mixing layer on the combined cycle engine was introduced, and the study progress of the supersonic mixing layer and the scalar mixing process in the supersonic mixing layer both at home and abroad was summarized, then the methods for counteracting the shortcomings of the study on scalar transport and diffusion characteristics of supersonic mixing layer with high Reynolds number were proposed. Finally, some directions being worth studying deeply in the field were pointed out.