溢洪道出口斜切型挑坎挑射水舌三维数值模拟  

3-D numerical simulation of the jet nappe in the beveled flip bucket of the spillway

作　　者：薛宏程[1] 刁明军[1] 岳书波[1] 徐兰兰[2] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065 [2]中国长江电力股份有限公司,湖北宜昌443000

出　　处：《水利学报》2013年第6期703-709,共7页Journal of Hydraulic Engineering

基　　金：四川省学术和技术带头人培养资金资助(2012DTPY020)

摘　　要：采用RNGk-ε紊流模型与VOF方法对溢洪道斜切型挑坎挑射水舌进行了水气二相流三维数值模拟。计算得到了空中水舌形态、水舌挑距、水舌入水角度及入水速度,模拟结果与模型试验和理论计算结果吻合良好,分析了空中水舌及水舌入水区域的流场、水舌入水位置、紊动能κ和紊动能耗散率ε的分布规律以及提高水舌数值模拟精度的措施。论文研究结果表明本数值模拟方法对类似工程基本可以代替模型试验,从而提高研究效率,并为工程优化设计及运行提供科学依据。In order to study the hydraulic characteristics of jet nappe in open air, RNG k-e turbulent mod- el and VOF water-air two phases model were applied to simulate the water-air two-phase jet nappe from a beveled flip bucket to a plunge pool. The calculated shape of water tongue, horizontal length, incidence ve- locity and angle of the jet nappe are in good agreement with the data obtained in experiments and theoreti- cal results, what＇s more, the distribution of flow field, turbulent kinetic energy and turbulent dissipation rate of jet nappe are analyzed. The result indicates that model experiment can be replaced by the numeri- cal simulation effectively to some extent. Furthermore, it also can provide some data for engineering design.

关 键 词：斜切型挑坎 挑射水舌 水气二相流 VOF法 数值模拟 

分 类 号：TV135.2[水利工程—水力学及河流动力学]