对流槽模拟对流边界层实验研究

叙述了利用对流槽（长＊宽＊高为２００ｃｍ＊４０ｃｍ＊４５ｃｍ）模拟对边界层（ＣＢＬ）的温度场结构特征的实验研究了工作，包括平均温度、垂直热通量、温度脉动、温度谱等，以及混合层顶部夹卷特征，模拟实验结果表明，对流槽能很好地模拟对流边界层发展过程中边界层结构特征和湍流特征，并且细致观测到混合层顶部夹卷过程，为揭示卷机制提供实验依据。

A LABORATORY SIMULATION OF CBL IN A WATER CONVECTION TANK

A water convection tank was used to study the structures of convective boundary layer (CBL),including vertical profiles of mean temperature and heat flux and temperature fluctuations.Experimental details are compared with the measurements of wixed layer, and a visual observation of the temperature in it is given. It is helpful to understand the details of entrainment.The temperature spectrum for a height near the middle of mixed layer shows the existence of an interial subrange as well as a viscous convective subrange.The results of our laboratory simulation indicate that the water convection tand can successfully simulate the development of CBL,and show the details of CBL structrure.This makes it possible to establish the mechanism of CBL,especially that of the entrainment.