温华兵,桑晶晶,刘红丹
WEN Hua-bing,SANG Jing-jing,LIU Hong-dan

• 1:江苏科技大学振动噪声研究所
• 2:重庆江增船舶重工有限公司

摘要(Abstract)：

以某型号大型船用涡轮增压器压气机为研究对象,以CFD软件为平台,利用具有k-ε双方程湍流模型的NS方程计算了压气机的三维黏性非定常流场特性。采用Ffowcs Williams-Hawkings方程(简称FW-H方程)对压气机的离散噪声进行了分析,并与经验公式进行了比较。深入研究了不同转速、流量对压气机气动噪声的影响。分析表明,叶轮内气动噪声水平较高,是主要噪声源;转速对于离散噪声影响较大,转速增加一倍,声压级上升约14dB;同一转速下,流量的降低将导致噪声幅值增加,但相对于转速变化其影响较小。
The unsteady three-dimensional viscous flow field of a large marine turbocharger compressor was simulated by Navier– Stokes equations with the two-equation( k-ε) turbulence model based on the CFD software. The discrete noise of the compressor was analyzed by the Ffowcs Williams-Hawkings formulation( FW-H for short),and the results were compared with the experimental formula. The effect of the speed and the flow rate on the aerodynamic noise was further studied. The numerical results indicate that the aerodynamic noise of the impeller is dominant; the rotating speed of the impeller has a great influence on the discrete noise,the noise increased by about 14 dB when the rotating speed was doubled; the noise will increase when the flow rate reduces at the same speed,but the effect is much less than the speed of the impeller.

关键词(KeyWords)： 涡轮增压器;压气机;非定常流;气动噪声;频谱
turbocharger;compressor;unsteady flow;aerodynamic noise;frequency spectrum

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(11302088)

作者(Author): 温华兵,桑晶晶,刘红丹
WEN Hua-bing,SANG Jing-jing,LIU Hong-dan

参考文献(References)：

• [1]Raitor T,Neise W.Sound generation in centrifugal compressors[J].Journal of Sound and Vibration,2008,314(3):738-756.
• [2]毛义军,祁大同.叶轮机械气动噪声的研究进展[J].力学进展,2009,39(2):189-202.
• [3]Liu Q,Qi D,Mao Y.Numerical calculation of centrifugal fan noise[J].Proceedings of the Institution of Mechanical Engineers,Part C:Journal of Mechanical Engineering Science,2006,220(8):1167-1177.
• [4]Sun H,Lee S.Numerical prediction of centrifugal compressor noise[J].Journal of sound and vibration,2004,269(1):421-430.
• [5]Jeon W H,Lee D J.An analysis of the flow and aerodynamic acoustic sources of a centrifugal impeller[J].Journal of Sound and Vibration,1999,222(3):505-511.
• [6]温华兵,徐文江,鲍苏宁,等.柴油机废气涡轮增压器噪声机理及性能试验研究[J].内燃机工程,2013,34(1):76-80.
• [7]Rammal H.Acoustics of turbochargers[S].2007 SAE Noise and Vibration Conferenee and Exhibition.Charles,USA,2007.
• [8]良辰.ANSYS Fluent航空气动噪声解决方案[J].航空制造技术,2012,(9):103-104.
• [9]朱晓升,丁振宇,高增梁.烟气脱流塔风诱导振动的TMD控制研究[J].压力容器,2013,30(2):8-14.
• [10]张杰,张雪梅,沈岑,等.基于Modelica/Dymola的小型燃气轮机建模与仿真[J].机电工程,2013,30(4):476-479.
• [11]万剑峰,杨爱玲,戴韧.开式叶轮气动噪声信号离析方法和运用[J].流体机械,2013,41(11):6-11.
• [12]万剑峰,杨爱玲.基于相关分析的开式叶轮气动噪声的试验研究[J].流体机械,2013,41(10):1-6.
• [13]盛美萍,王敏庆,孙进才,等.噪声与振动控制技术基础[M].北京:科学出版社,2001.