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超声速混合层(Mc=0.5)流动现象的实验观测和计算分析 被引量:2

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摘要 实验和计算均能获得混合层流动失稳结构的参数,但以往两种研究方法所获结果缺乏对比验证.我们用NPLS(Nano-Based Planar Laser Scattering)流动显示技术和二维DNS方法研究了Mc=0.5(M1=3.5/M2=1.4)的超声速混合层流动.从实验照片测量了混合层流动在无附加扰动和施加谐波扰动下流动结构波长,与二维DNS计算结果差异均在1%以内.两种方法的结果得到了相互验证.实验测量了结构的对流输运速度,证实对于超/超混合层流动,满足Mc,2<Mc,1关系.实验照片清晰记录了大涡拟序结构的演化过程,如混合层流动的对并和间歇现象.
出处 《中国科学(G辑)》 CSCD 北大核心 2009年第8期1126-1133,共8页
基金 国家自然科学基金资助项目(批准号:10772168)
作者简介 E—mail:yangwb2006@sina.com
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