基于循环平稳分析的推进泵流致噪声特性研究  

Research on flow-induced noise properties of waterjet pump based on cyclostationary method

作　　者：李倩[1] 梁宁[1] 童威棋 徐海平 曹琳琳[1] 吴大转[1,3] LI Qian;LIANG Ning;TONG Wei-qi;Xu Hai-ping;CAO Lin-lin;WU Da-zhuan(College of Energy Engineering,Zhejiang University,Hangzhou 310027,China;Kunming Branch of Xi'an Precision Machinery Research Institute,Kunming 650032,China;State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学能源工程学院,浙江杭州310027 [2]西安精密机械研究所昆明分部,云南昆明650032 [3]浙江大学流体动力与机电系统国家重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2021年第9期1660-1667,共8页Journal of Zhejiang University：Engineering Science

摘　　要：为了深入理解推进泵流致噪声激励源机理,为推进泵低噪声设计提供支撑,以某双级推进泵为对象,基于其多工况下的辐射噪声实测结果,围绕推进泵流致噪声的调制机理及流致噪声源的提取方法展开研究.在空泡水洞中测量该双级推进泵的辐射噪声,采用循环平稳分析方法,进行噪声解调分析与流致噪声源特征频率提取;开展该双级推进泵内流场的非定常数值模拟,分析其瞬态内流场分布特性与三向激振力特性.联合信号处理结果与内流场模拟结果,研究推进泵流致噪声源的关键特性与形成原理.结果表明,导叶是影响双级推进泵辐射噪声特性的关键因素,导叶调制线谱的强度与推进泵的来流条件、运行工况密切相关,叶轮与导叶的匹配性设计对推进泵振动噪声控制起关键作用.To deeply understand the mechanism of flow induced noise excitation source of waterjet pump and to support the low-noise design of waterjet pump,the acoustic performance of a two-stage propulsion pump was researched.Based on the measured radiated noise under multiple rotational speeds,the modulation mechanism of flow induced noise of this waterjet pump and the extraction method of flow induced noise source were studied.The radiated noise of this two-stage waterjet pump was measured in a cavitation tunnel,and the cyclostationary analysis was conducted to demodulate and extract the characteristic frequency of the flow-induced noise source.The unsteady numerical simulation of the internal flow field of the two-stage propulsion pump was carried out to analyze the distribution characteristics of the transient internal flow field and the characteristics of three-dimensional exciting force.Combining the signal processing results with the internal flow field simulation results,the key characteristics and formation principle of the flow induced noise source of the propulsion pump were studied.Results show that the guide vane plays a key role in the radiated noise characteristics of the two-stage waterjet pump,and the modulation intensity is decided by the incoming flow conditions and operating conditions of the waterjet pump.The matching design of the impeller and guide vane takes a decisive position in the noise and vibration control of waterjet pump.

关 键 词：推进泵 循环平稳 流致噪声 双级泵 空泡水洞试验 

分 类 号：TU134[建筑科学—建筑理论]