超音速混合层稳定性分析及增强混合的研究

利用流动稳定性提高超音速混合层的混合效率,对于提高超音速流的高效混合是一个有效途径。研究结果表明,有展向曲率的三维混合层中,三维扰动的增长率很大,且法向的掺混能力也较强,可以有效地增强混合。对于高马赫数来流的超音速混合层,这一特性依然存在,这将有利于提高高超音速混合层的混合能力。

Investigation on stability of 3-d supersonic mixing layer and method of enhancing the mixing

A useful method of enhancing the mixing for supersonic mixing layer is improving flow dynamics instability.In this paper,the three-dimensional (3-D) compressible mixing layers with spanwise curvature was discussion.According to analyses of flow dynamics stability,the three dimensional disturbances have lager rate of amplification,have better ability of blending in normal direction of mixing layer and can enhance the mixing for 3-D compressible mixing layer in this compressible mixing layers.This characteristic is also for supersonic and hypersonic mixing layer,which is useful method of enhancing the mixing for supersonic and hypersonic mixing layer.