实验流体力学2011，Vol.25Issue(4)：42-44,59,4.
压缩混合层密度梯度场特性的实验研究
Experimental research on characteristic of density gradient in a compressible mixing layer
摘要
Abstract
Using schliren technique, the characteristic of density gradient in a compressible mixing layer was investigated at different convective Mach numbers (Mr = 0. 28, 0. 38, 0. 72). The instantaneous schlieren images show that a compressible mixing layer begins to swing at higher Mt number. Compared the schlieren images at different Mr numbers, structures similar to Brown-Roshko have been observed for Mr<0. 3. In addition, the compressible mixing layer begin to swing with the increase of compressibility effect (convective Mach number Mr>0. 3). And then the location beginning to swing moves forward when the convective Mach number increasing. Moreover,the region with the existence of a large-scale structure at different Mc numbers has different characteristics.关键词
可压缩混合层/对流马赫数/密度梯度场/摆动/纹影技术Key words
compressible mixing layer/ convective Mach number/ density gradient/ swing/schlieren technique分类
航空航天引用本文复制引用
甘才俊,李娘,毛涛,熊红亮..压缩混合层密度梯度场特性的实验研究[J].实验流体力学,2011,25(4):42-44,59,4.基金项目
国家自然科学基金资助项目(90305014) （90305014）
国家科技委973资助项目(2009CB724105) （2009CB724105）
