Sensitivity of Mixed Subsonic-Supersonic Turbulent Mixing Layers
Sensitivity of Mixed Subsonic-Supersonic Turbulent Mixing Layers
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DOI：
10.2514/2.5813
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发表时间：
2001-07
影响因子：
1.9
通讯作者：
D. C. Cottrell;M. Plesniak
中科院分区：
文献类型：
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作者：
D. C. Cottrell;M. Plesniak
对几种不同的对流马赫数（MC = 0.2，0.5和0.7），计算结果（混合层厚度、平均速度和湍流参数）与实验结果进行了比较，以作为程序的基准。在此基础上，通过对边界条件引入小扰动和重新计算混合层，进一步研究了MC =0.7情况对扰动的敏感性。特别研究了扰动对二次流滞止压力和试验段壁面调整角的影响。结果表明，对流滞止压力的微小变化（<4%）对可压缩混合层的生长速率有显著的影响。此外，小于3 °的试验段壁的发散或收敛导致沿流向压力梯度和混合层发展的明显变化。
for several different convective Mach numbers (MC =0.2, 0.5, and 0.7 ), and the computed results (mixing layer thickness, mean velocity, and turbulence parameters ) were compared with experiments to benchmark the code. Following this qualie cation procedure, the sensitivity of the MC =0.7 case to disturbances was further investigated by introducing small perturbations to the boundary conditions and recomputing the mixing layer. Specie cally, effects of perturbations to the secondary stream stagnation pressure and test section wall adjustment angle were investigated. Itwasfound thatthecompressiblemixing layergrowth ratewassignie cantly altered by small changes (<4%)in thesecondary stream stagnation pressure. In addition, divergence orconvergence ofthetest section walls oflessthan3degresultedinappreciablechangesinthestreamwisepressuregradientandmixinglayerdevelopment.