一种强螺旋流现象的实验研究

螺旋流一般通过切向进流、安装导流片或旋转管道三种方式产生,但Horii 等人通过实验发现有三种装置也产生了非常稳定的螺旋流。笔者利用激光测速仪针对其中一种装置产生的螺旋流进行了时均速度分布测量。实验结果表明,本例情况下时均流动先是形成不对称双涡结构然后过渡到单一涡结构而形成螺旋流的

Experiment study on a sort of strong swirling flow

In general, swirling flows in pipes are generated by three means: tangentially inletting medium; guiding fluid by vanes with a certain angle and axially rotating pipe. Horii and his co workers have in experiments discovered that there exist other three kinds of apparatuses that can also cause strong swirling flows. In this paper, the velocity distributions of the swirling flow taking place in one of the three apparatuses are measured by LDV and the feature of the flow is drawn from the results which illustrate that the swirling is formed in the evolution of asymmetric double vortices into single vortex.