应用ESPI研究水平热管的自然对流现象

INVESTIGATION OF NATURAL CONVECTION PHENOMENA FROM A HORIZONTAL HEATED TUBE USING ESPI

本文应用 Vintens ESPI、全息干涉及新发展的 Video 的全息干涉技术,研究了水平热管的自然对流现象。介绍了这三种技术的光学系统,和关于气体温度场的测量原理和测量结果。与热电偶所测温度值比较,结果相当一致。文中还就可能的测量误差作了定性分析。

The natural convection phenomena from a horizontal heated tube is investigated using Vintens ESPI, Video holographic interferometry and holography. Three different optical arrangements and the principle of gas temperature measurement are described. The experimental results obtained from the above techniques are compared with those from thermocouples. The comparison shows that they are consistent with each other. The sources of error which may affect the measurement are discussed and estimated qualitatively.