热线近壁测速的实验研究

An Experimental Investigation on the Hot-Wire Anemometer Measurement Near Walls

本文分别以导热系数相差很大的材料做成实验平板，在常温与加热的情况下，用恒温热线风速仪和不同热线探头，测量了靠近固壁１ｍｍ以内的平板边界层时均流速分布。实验结果表明，有多种因素影响粘性次层流速公布的测量结果。本文展示这些因素，并进行了分析讨论。

Abstract in this study, experimental Plated were made of materials with largely different thermal conductivities and tested under normal temperature as well as hafted condition. The boundary layer mean-velocity distribution was measuted within 1mm from walls of flat plates with constant temperature anemometer and different hot-wire probes. Experiments indicated that the result of velocity measurements in viscous sublsyer was influenced by multi-factors. These factors are discussed in this paper.