再论异重流和均质流动的一些相似关系  

Further discussion on similarity relationship between stratified flow and uniform flow

作　　者：赵振国[1] 

机构地区：[1]中国水利水电科学研究院水力学研究所,北京100044

出　　处：《水利学报》2007年第2期129-135,共7页Journal of Hydraulic Engineering

摘　　要：在对上层静止下层流动的异重流和均质明渠流之间相似关系研究的基础上,本文将这一成果推广,给出了上层流动下层静止的异重流和均质明渠流之间的一些相似关系,并将结果应用于二维重叠式排取水口的水深计算,结果与前人的实验一致。考虑到实际的重叠式排取水口都是三维的,所以本文利用前人的实验结果,进一步给出了三维重叠式排取水口高度及水深的计算方法,所得结果揭示了排水口温差水跃的形成机理和形成条件。Based on the analysis of similarity between ordinary uniform flow and stratified flow with still upper layer and flowing lower layer, given by the author in the previous paper, the similarity relationships in case of flowing upper layer and still lower layer are further discussed. The analysis result is applied to calculate the flow depths of 2-D thermal density flow at the entrance of intake-under-outlet style structure and verified by model test data. On this basis, the data obtained from 3-D model tests given by former researchers are utilized to establish the method for calculating the height and flow depth of 3-D intakeunder-outlet structure. The method is further applied to investigate the formation conditions and mechanism of the hydraulic jump occurred to the stratified flow due to temperature difference at outlets.

关 键 词：分层流 温差异重流 均质流 相似关系 重叠式排取水口 

分 类 号：TV133[水利工程—水力学及河流动力学]