Numerical simulation of turbulent flow behind sluice gate under submerged discharge conditions》.pdfVIP

257 2015,27(2):257-263 DOI: 10.1016/S1001-6058(15)60480-2 Numerical simulation of turbulent flow behind sluice gate under submerged * discharge conditions LIU Shi-he (刘士和), LIAO Ting-ting (廖庭庭), LUO Qiu-shi (罗秋实) 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China, E-mail: shihe3086@163.com 2. Yellow River Engineering Consulting Co., Ltd, Zhengzhou 450003, China (Received May 21, 2014, Revised February 12, 2015) Abstract: The turbulent flow discharging under a sluice gate is one kind of typical flows with complicated boundaries in hydraulic and hydroelectric engineering, and the characteristics of its flow field and flow evolution are important in engineering hydraulics. Although there were many studies in this regard, which mainly focus on the discharge capacity, the local scour and the mean flow field, some issues remain to be further investigated, for example, the variation of the mechanical energy during the scouring process, and the adjustment of the unsteady turbulent flow after the local scour with the downstream steady uniform flow. In this paper, the turbulent flow behind a sluice gate is divided into a rapidly varied flow region and a gradually varied flow region, and the above problems are investigated by theoretical analysis and numerical simulation. The main conclusions are as follows: (1) In the discharging process of the turbulent flow under a sluice gate, the river bed would be scoured continuously and the water–air interface is adjusted accordingly, which leads to