摘要
以1∶15的3/4开口式整车模型风洞为研究平台,对此类风洞的喷口射流剪切层的流动结构展开研究,采用热线风速仪针对3种收集口角度和两种不同喷口速度的工况,对射流剪切层内的流场进行了瞬时速度的测量。通过对平均速度及速度脉动的分析,得到了各种工况下射流剪切层的结构特征、厚度发展特征及其中的脉动分布情况,明确了该风洞射流剪切层所特有的非定常流动结构。
Based on the platform of 1 ： 15 3/4 open-type vehicle model wind tunnel and by means of hot- wire anemometer, instantaneous velocity of the jet shear layer flow was measured in three different collector angles and under two nozzle velocities. Through the analysis of the average speed and velocity fluctuation, structural features of jet shear layer and the thickness and distribution of velocity fluctuation with different collector angles were found. The specific jet shear layer structure of unsteady flow was explicitly presented in this kind of model wind tunnel.
出处
《汽车工程学报》
2012年第6期446-451,共6页
Chinese Journal of Automotive Engineering
关键词
模型风洞
射流剪切层
试验
model wind tunnel
jet
shear layer
experiment
