白光氧气泡图像测速技术(英文)

White Light Bubble Image Velocimetry

本文介绍一种白光氧气泡图像测速新技术。用电解水产生的氧气泡做为流场示踪粒子,用两个闪光时间间隔由数字电路控制的普通闪光灯做为粒子图像底片记录的多脉冲光源,取代了以往PIV测速技术中通常所用的固体示踪粒子及大功率激光光源。该技术的显著优点是实验成本低,无污染,而且光源功率需求低,并且可以获得高信噪比的粒子图像记录底片。通过实际应用说明该实验技术是水洞力学中速度场测量的一种有效方法。

One kind of the particle image velocimetry in which a flash set and a plane sheet like-bubble mass are instead of the power laser and normal particles separately,so called White Light Bubble Image Velocimetry (WLBIV), is presented. The results show that the instantaneous 2-dimensional velocity vector field at more than 1000 points with accepted accuracy for a starting vortex flow in low-speed water channel is obtained and the main advantages of the WLBIV method are no very cost high-power laser and no dusty pollution in the testing facilities.