一、引言 近年来,随着超大规模集成电路的发展和应用,使得电子设备的冷却问题越来越突出,竖板通道的自然对流换热的研究进一步得到了人们的重视.然而,尽管有许多学者对该问题进行了数值计算与实验研究,由于自然对流的速度小,流场对外界的干扰很敏感,再加上通道几何条件的限制,文献中很少见到通道内速度场的测量结果.现有的许多关 I. INTRODUCTION In recent years, with the development and application of very large-scale integrated circuits, the cooling of electronic equipment has become more and more prominent, and the research on the natural convection heat exchange in vertical channels has received more attention. However, Scholars carried out numerical calculations and experimental studies on the problem. Due to the small velocity of natural convection and the sensitivity of the flow field to the outside world, coupled with the restriction of channel geometry, the measurement results of the velocity field in the channel are seldom seen in the literature Many of the existing ones