长廊式调压室流态CFD分析与吸气漩涡消除措施研究《水力发电学报》2009年4期.pdfVIP

水 力 发 电 学 报 JOURNAL OF HYDROELECTRIC ENGINEERING 长廊式调压室流态 CFD 分析及吸气旋涡消除措施研究 邓淞苡 1 张剑 2 程永光 1 吴迪 1 （1.武汉大学，水资源与水电工程科学国家重点实验室，武汉 430072; 2.重庆江河工程咨询中心，重庆 400015） 摘要：立轴吸气旋涡是水电工程须避免出现的有害流态。本文应用必威体育精装版的 CFD 技术，模拟了长廊式调压室内流态并研 究了一种有效抑制吸气旋涡的措施。文中首先介绍所选用的 VOF 带自由面流动模型和 RNG k-ε湍流模型；然后选用堰 流、闸孔出流、明渠非恒定流和典型立轴吸气旋涡来验证 CFD 计算的可靠性和准确性；接着针对具体水电站尾水长廊 式调压室进行了细致的流态分析，弄清了不良流态的成因；进而提出消除吸气旋涡的“消涡墩”措施，并且通过两个 方案的对比分析验证了其良好的消涡效果。 关键词：CFD；调压室；流态；吸气旋涡 Flow Characteristics of Long Corridor-Shaped Surge Tank and Elimination of the Air-Entraining Vertical Vortices: CFD Simulation and Analysis DENG Songyi1, ,ZHANG Jian2, CHENG Yongguang1, WU Di1 (1.State Key Laboratory of Water Resources and Hydropower Engineering Science，Wuhan 430072; 2.Chongqing river engineering consultation center, Chongqing 400015) Abstract: Air-entraining vertical vortex is harmful to hydropower projects and should be avoided. In this article, the latest CFD technique is applied to simulate the flow characteristics in long corridor-shaped surge tank and an effective approach to eliminate the vertical vortex in it is proposed. After introduction, the VOF model and RNG k-ε turbulence model used in the simulation are given, and then the reliability and accuracy of the method is verified by simulating weir flow, sluice gate flow, unsteady open channel flow and typical air-core vortex examples. Based on extensive analysis of the flow characteristics of a practical long corridor-shaped