近壁气流速度分布的LDA实验研究  

An Experimental Investigation of Near-Wall Velocity Profiles by LDA

作　　者：许振忠[1] 陈燕[1] 刘书亮[1] 赵奎翰[1] 

机构地区：[1]天津大学,天津300072

出　　处：《小型内燃机与摩托车》2002年第5期4-6,共3页Small Internal Combustion Engine and Motorcycle

摘　　要：本文使用三光束二维氩离子激光多普勒测速仪 (LDA)对平板和模拟燃烧室半圆型槽内的近壁气体速度分布进行了实验研究 ,并与用热线风速仪 (HWV)的测量结果进行了对比。结果显示 :热线风速仪在距离壁面较远处测量结果与理论计算值相近 ,距离壁面越近误差就越大。而LDA在整个测量区域的测量结果都有较高灵敏度。通过了解近壁气流速度分布 。In this paper, using 3 beam two component Ar ion Doppler Anemometry (LDA) and Hot Wire Velocimetry (HWV), the near wall velocity profiles were measured on the panel surface and inside the half circular trough shape iron of chamber model. The results show that LDA measurements are more accurate during the whole field, and the data by HWV method are much accurate far away from the wall, but the nearer to the wall less inaccurate. So it may lay the basis for computer modeling heat transfer in cylinder of engines.

关 键 词：激光多普勒测速仪 边界层速度分布 发动机 LDA 热效率 

分 类 号：TK407[动力工程及工程热物理—动力机械及工程]