混流式水轮机水声特性数值模拟  

Numerical Simulation of Hydroacoustic Characteristics of Mixed-flow Turbines

作　　者：闫萍鑫 于凤荣[1,2] 曾云 李正雄[3] 耿贞伟 安彪 YAN Pingxin;YU Fengrong;ZENG Yun;LI Zhengxiong;GENG Zhenwei;AN Biao(School of Metallurgy and Energy Engineering,Kunming University of Sciences and Technology,Kunming 650031,Yunnan,China;Hydraulic Machinery Intelligent Test Engineering Research Center of Yunnan University,Kunming 650041,Yunnan,China;Banda Engineering Construction Administration,Huaneng Lancang River Hydropower Co.,Ltd.,Changdu 650214,Tibet,China;Information Center of Yunnan Power Grid Co.Ltd,Kunming 650041,Yunnan,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650031 [2]云南省高校水力机械智能测试工程研究中心,云南昆明650041 [3]华能澜沧江水电股份有限公司班达工程建设管理局,西藏昌都650214 [4]云南电网有限责任公司信息中心,云南昆明650041

出　　处：《水力发电》2023年第7期57-61,共5页Water Power

基　　金：国家自然科学基金资助项目(52079059)。

摘　　要：为研究西南地区某梯级电站混流式水力机组在最大水头工况运行时出现的不明水声噪声问题,基于水电站实际情况,建立该水力机组水轮机三维全流道等比例仿真模型,使用CFD数值计算模拟方法对该模型进行声学计算分析。模拟采用宽频噪声与FW-H积分声波波动方程声学计算方法,计算得到了该水轮机在最大水头工况下各部件近场噪声的主要噪声辐射位置声功率级大小以及远场噪声中的声频谱特性,为水轮机声学检测和状态监测诊断奠定了基础。In order to study the unidentified hydroacoustic noise of the mixed-flow hydraulic unit in a cascade power station in the southwest region when operating under the maximum head condition,a three-dimensional full-flow channel equal-scale simulation model of turbine is established based on the actual situation of the hydroelectric power station,and the model is analyzed acoustically using CFD numerical calculation simulation method.The simulation adopts the acoustic calculation method of wide-band noise and FW-H integral acoustic fluctuation equation to calculate the magnitude of sound power level of the near-field noise of each component of turbine under maximum head condition and the acoustic spectrum characteristics of the far-field noise,which lays a foundation for the acoustic detection and condition monitoring and diagnosis of the turbine.

关 键 词：声辐射 水声特性 数值模拟 水轮机 声场分析 声比拟 

分 类 号：TV734.1[水利工程—水利水电工程]