低速风洞PIV实验中的示踪粒子投放技术  

Testing technique of PIV in low-speed wind tunnel

作　　者：陈莹[1] 邓学蓥[1] 王延奎[1] 王兵[1] 董超[1] 

机构地区：[1]北京航空航天大学流体力学教育部重点实验室,北京100083

出　　处：《实验流体力学》2007年第2期78-81,共4页Journal of Experiments in Fluid Mechanics

摘　　要：使用Dantec公司的FlowMap PIV系统,在低速风洞中测量二维风速,研究PIV在实际流场测量中的示踪粒子投放技术。实验中使用不同的方式散播示踪粒子测量二维风速,通过对实测风速及流场均匀度的比较,得出在实验段出口处向风洞投放粒子,使其在风洞中循环的方法是最佳散播粒子方式的结论,该方法不仅在小风速下可用,在风速60m/s下也可获得清晰的流场测量图片。The 2D velocity was measured with Dantec FlowMap PIV system in low speed wind tunnel. The purpose is to investigate the PIV testing technique in practical measurement. In this paper the results obtained by different ways of scattering seeding particles were analysed. It is indicated that the best way of spreading seeding particles is spreading particles at the exit of the experiment section and letting them circle in the whole tunnel. It can be used to measure the flow field both at the lower speed and at higher speed such as 60m/s.

关 键 词：PIV 涡结构 非对称背涡 空气动力学实验 

分 类 号：V211.7[航空宇航科学与技术—航空宇航推进理论与工程]