Numerical simulation of hydrodynamic noise in centrifugal pump based on LES

被引：7
作者：
Liu, Houlin [1 ]
Ding, Jian [1 ]
Wang, Yong [1 ]
Tan, Minggao [1 ]
Xu, Huan [1 ]
机构：
[1] Research Center of Fluid Machinery Engineering and Technology, Jiangsu University
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2013年 / 49卷 / 18期
关键词：
Centrifugal pump; Dipole source; Hydrodynamic noise; Large eddy simulation; Lighthill acoustic analogy;
D O I：
10.3901/JME.2013.18.177
中图分类号：
学科分类号：
摘要：
The computational fluid dynamics(CFD) technique combined with the Lighthill acoustic analogy theory are applied to study the hydrodynamic noise caused by the volute surface dipole and the blade rotating dipole in a centrifugal pump. The large eddy simulation method is employed to solve the transient flow field of the pump. The fluid fields show that obvious peak of pressure fluctuations near the tongue is observed at blade passing frequency under different flow conditions, indicating that the interaction between the impeller and the tongue is the main cause of pressure fluctuation near the tongue. The interior boundary element method(BEM) model of pump is constructed, and the sound scattering effect of the volute casing is considered. The direct BEM is applied to solve the interior sound field of the pump. The computational results show good agreements with experimental ones. The validation of the LES combined with the Lighthill method for the hydrodynamic noise computation is verified. The results show that the sound pressure level at the shaft frequency under the design point is lowest, and the level of noise at the blade frequency and its harmonics becomes higher as the flow rate increases. The noise level at the blade frequency and its harmonics can be predicted quantitatively by calculating the blade rotating dipole source. The trend of the noise caused by the volute surface dipole is identical with the experimental trend. Comparing with the design and higher flow rates, the error between simulation and experiment is bigger at partial flow rate. © 2013 Journal of Mechanical Engineering.
引用
收藏
页码：177 / 183
页数：6
相关论文
共 18 条
  • [1] Langthjem M.A., Olhoff N., A numerical study of flow-induced noise in a two-dimensional centrifugal pump, Part I: Hydrodynamics Journal of Fluids and Structures, 19, pp. 349-368, (2004)
  • [2] Choi J.S., Mclaughlin D.K., Thompson D.E., Experiments on the unsteady flow field and noise generation in a centrifugal pump impeller, Journal of Sound and Vibration, 263, pp. 493-514, (2003)
  • [3] Srivastav O.P., Pandu K.R., Gupta K., Effect of radial gap between impeller and diffuser on vibration and noise in a centrifugal pump, Journal of the Institution of Engineers (India): Mechanical Engineering Division, pp. 36-39, (2003)
  • [4] Yuan S.Q., Yang J., Yuan J.P., Et al., Experimental investigation on the flow-induced noise under variable conditions for centrifugal pumps, Chinese Journal of Mechanical Engineering, 25, 3, pp. 456-462, (2012)
  • [5] Liu H., Wang Y., Yuan S., Et al., Effects of impeller outlet width on the vibration and noise from centrifugal pumps induced by flow, Journal of Huazhong University of Science and Technology, 40, 1, pp. 123-127, (2012)
  • [6] Tan M., Wang Y., Liu H., Et al., Effects of number of blades on flow induced vibration and noise of centrifugal pumps, Journal of Drainage and Irrigation Machinery Engineering, 30, 2, pp. 131-135, (2012)
  • [7] Wang M., Freund J.B., Lele S.K., Computational prediction of flow-generated sound, Annual Review of Fluid Mechanics, 38, 1, pp. 483-512, (2005)
  • [8] Kato C., Yamade Y., Wang H., Et al., Numerical prediction of sound generated from flows with a low Mach number, Computers and Fluids, 36, 1, pp. 53-68, (2007)
  • [9] Huang J., Geng S., Wu R., Et al., Comparion of noise characteristics in centrifugal pumps with different types of impellers, Acta Acustica, 35, 2, pp. 113-118, (2010)
  • [10] Jiang Y.Y., Yoshimura S., Imai R., Et al., Quantitative evaluation of flow-induced structural vibration and noise in turbomachinery by full-scale weakly coupled simulation, Journal of Fluids and Structures, 23, 3, pp. 531-544, (2007)
12