应用频移激光测速系统测量高湍流度迴流流动

被引：11

作者：

沈熊

廖湖声

机构：

[1] 清华大学工程力学系

来源：

力学学报 | 1982年 / 05期

关键词：

湍流度; 管道; 激光测速系统; 阶跃; 均方根脉动速度; 平均速度剖面; 雷诺数; REYNOLDS数; 湍流附面层; 频移;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

本文介绍了一种对方向敏感的频移激光多普勒测速系统。采用两个声光器件获得所需的频移量。在雷诺数2750到8250范围内,用此系统测量了平面二维单边阶跃扩张管道中的高湍流度迴流流动。通过模拟法和数字法处理数据,得到了迴流区的平均速度和湍流度分布,还从数字数据处理器得到了速度概率分布和概率密度函数。结果表明,频移激光测速系统可以成功地用于各种复杂的流动,如高湍流度流动、迴流流动和交变流动的测量。

引用

页码：505 / 511

页数：7

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