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二维后向台阶流流动特性的实验研究 被引量:9

A Experimental Study on the 2D Time-average Flow over a Backward Facing Step via PIV
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摘要 利用PIV技术,通过系统对150<Re<6500范围内,二维后向台阶定常流进行无接触的连续观测,得到了各种流态情况下瞬时流场的流速分布。并使用所获得的各种雷诺数Re下瞬时流场数据,通过时均化处理成时均流场数据和各类流速分布图。本文分析了后向台阶流瞬时流场特性和时均流场特性,比较了流动中瞬时流场结构和时均流场结构的区别,讨论了回流区长度、回流涡涡心的位置等的变化规律。并与Armaly等所作的实验结论进行了分析比较。本文研究表明,后向台阶流的流场同时具有非定常性和定常性的特性。 In Reynolds number range of 150
出处 《实验力学》 CSCD 北大核心 2006年第2期225-232,共8页 Journal of Experimental Mechanics
基金 国家自然科学基金项目(50479035)资助
关键词 PIV 后向台阶流 分离流 回流区长度 PIV backward-facing step flow separated flow length of recirculation region
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参考文献11

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