排灌机械工程学报
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排灌机械工程学报  2012, Vol. 30 Issue (2): 141-146    DOI: 10.3969/j.issn.1674-8530.2012.02.004
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离心泵用赫姆霍兹水消声器声学特性数值模拟
 袁建平1, 2, 金荣1, 陈红亮3, 付燕霞1, 孙威1
(1.江苏大学流体机械工程技术研究中心, 江苏 镇江 212013; 2.昆士兰科技大学建筑环境与工程学院, 澳大利亚 布里斯班 QLD 4001; 3.浙江水利水电专科学校, 浙江 杭州 310018)
Numerical simulation of acoustic performance of Helmholtz   watermuffler for centrifugal pumps
 YUAN  Jian-Ping-1, 2 , JIN  Rong-1, CHEN  Hong-Liang-3, FU  Yan-Xia-1, SUN  Wei-1
(1.Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013,China; 2.Faculty of Built Environment and Engineering, Queensland University of Technology, Brisbane QLD 4001, Australia; 3.Zhejiang Water Conservancy and Hydropower College, Hangzhou, Zhejiang 310018, China)
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摘要 为了降低离心泵沿管路传播的辐射噪声,基于有限元理论,运用Ansys CFX 软件对不同工况下离心泵出口压力脉动进行计算.研究了离心泵出口压力脉动特性,运用声学软件Sysnoise对内置和外置连接管、不同连接管长度、并联连接管、串联和并联共振腔以及改变串联和并联共振腔内连接管长度的赫姆霍兹水消声器的声学特性分别进行仿真,并分析其影响规律.仿真结果表明:连接管长度、连接管连接方式能有规律地改变赫姆霍兹水消声器的共振频率和传递损失;串联和并联共振腔可以同时出现多个共振频率,但串联共振腔产生的共振频率向其各自单腔的共振频率的两端移动,传递损失有所下降,且各腔内共振频率相互影响;并联共振腔产生的共振频率向其各自单腔的共振频率的内部移动,同时传递损失大幅增大,各腔内传递损失互不干扰.
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袁建平
金荣
陈红亮
付燕霞
孙威
关键词离心泵   水消声器   声学特性   数值模拟   传递损失     
Abstract: In order to reduce the noise issued from centrifugal pump pipelines, the pressure fluctuations at the pump were calculated under different operating conditions by using the software Ansys CFX. The pressure fluctuations characteristics were investigated. Moreover, the acoustic performance of Helmholtz watermuffler with inner and outboard neck, different lengths of neck, parallel necks, series and parallel resonator cavity was analyzed by means of the acoustic software Sysnoise.  The simulated results show that the length of neck, connection type between neck and resonator cavity affect the resonant frequency and transmission loss of Helmholtz watermuffler regularly. One more resonant frequency can appear in series and parallel resonator cavities, but the resonant frequencies in series cavities move towards both ends of the resonant frequency of each single cavity with slightly degraded transmission loss. Further there are interactions among the resonant frequencies in the cavities. The resonant frequencies in parallel cavities move towards the inside of two resonant frequencies each single cavity with increased transmission loss. Meanwhile, the interactions among the resonant frequencies in the cavities do not exist.
Key wordscentrifugal pump   water muffler   acoustic performance   numerical simulation   transmission loss   
收稿日期: 2011-09-14; 出版日期: 2012-03-30
基金资助:

国家自然科学基金资助项目(50979034); 江苏省高校自然科学研究项目(09KJB570001)

通讯作者: 袁建平(1970—),男,江苏金坛人,研究员(yh@ujs.edu.cn),主要从事流体机械内部流动及其诱导振动与噪声的研究.   
作者简介: 金荣(1985—),男,江西九江人,硕士研究生(jr2030@163.com),主要从事流体机械内部流动诱导振动噪声的研究.
引用本文:   
袁建平,金荣,陈红亮等. 离心泵用赫姆霍兹水消声器声学特性数值模拟[J]. 排灌机械工程学报, 2012, 30(2): 141-146.
YUAN Jian-Ping,JIN Rong,CHEN Hong-Liang et al. Numerical simulation of acoustic performance of Helmholtz   watermuffler for centrifugal pumps[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(2): 141-146.
 
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