Pressure Pulsation Characteristics of the Cascade and Its Impact on Flow-induced Noise

doi:10.3901/JME.2019.08.225

IR > 新能源学院

	Pressure Pulsation Characteristics of the Cascade and Its Impact on Flow-induced Noise
	Li, Rennian1,2 ; Li, Jin1 ; Quan, Hui1,2 ; Xi, Peng 3; Fu, Baiheng 1
	2019-04-20
发表期刊	Jixie Gongcheng Xuebao/Journal of Mechanical Engineering
ISSN	05776686
卷号	55 期号:8 页码:225-232
摘要	To analyze the effects of the cascade pressure pulsation on the flow-induced noise, the regenerative pump was selected since its irregular cascades, the three-dimensional unsteady flow is simulated based on the RNG k-Ε turbulence model. The pressure pulsation on the cascade surface is extracted as the sound source, after the accuracy of the numerical simulation method has been verified by the performance experiment. The indirect boundary element method is employed to solve the external field noise caused by the rotating dipole source. The results show that the pressure pulsation amplitude has the negative relationship with the flow rate, as well as it keeps same direction with the fluid energy increasing along the fluid movement direction, while its relative minimum appears on the position of the tongue region under non-design flow rate mode. The external sound field presents the character of strong dipole, the sound pressure level maintains it local minimum at the design operation, the sound lobes clockwise rotates as the shaft center is its rotating axis under the non-design condition, its magnitude increases in a radial manner, while the degree of the enhancement and rotation improves with the flow rate decreasing. Both the pressure pulsation and flow-induced noise main frequency are the rotation frequency, the secondary frequency of the pressure pulsation are the blade passing frequency and its harmonic frequency, while the secondary frequency of the sound is quite blurred, the sound pressure level curve decreasing tendency turn to slow, its oscillation tends to be more regularly starting at the blade passing frequency. Thus, much more attention should be paid to decrease the cascade flow-induced noise at its rotation frequency when the cascade noise reduction optimization designing. © 2019 Journal of Mechanical Engineering.
关键词	Acoustic fields Acoustic variables measurement Acoustic wave transmission Boundary element method Cascades (fluid mechanics) Noise abatement Numerical methods Oscillating flow Sailing vessels Turbine pumps Turbulence models Blade passing frequency Flow induced noise Indirect boundary element method Numerical simulation method Pressure pulsation Regenerative pumps Sound pressure level Three-dimensional unsteady flow
DOI	10.3901/JME.2019.08.225
收录类别	EI
语种	中文
出版者	Chinese Mechanical Engineering Society
EI入藏号	20193007225092
EI主题词	Acoustic noise
EI分类号	618.2 Pumps - 631.1 Fluid Flow, General - 674.1 Small Marine Craft - 751 Acoustics, Noise. Sound - 921.6 Numerical Methods - 941.2 Acoustic Variables Measurements
来源库	Compendex
分类代码	618.2 Pumps - 631.1 Fluid Flow, General - 674.1 Small Marine Craft - 751 Acoustics, Noise. Sound - 921.6 Numerical Methods - 941.2 Acoustic Variables Measurements
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/114707
专题	新能源学院能源与动力工程学院网络与信息中心
作者单位	1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Gansu Provincial Key Laboratory of Fluid machinery and Systems, Lanzhou; 730050, China; 3.LEO Group Pump (Zhejiang) Company Limited, Taizhou; 317500, China
第一作者单位	新能源学院
第一作者的第一单位	新能源学院
推荐引用方式 GB/T 7714	Li, Rennian,Li, Jin,Quan, Hui,et al. Pressure Pulsation Characteristics of the Cascade and Its Impact on Flow-induced Noise[J]. Jixie Gongcheng Xuebao/Journal of Mechanical Engineering,2019,55(8):225-232.
APA	Li, Rennian,Li, Jin,Quan, Hui,Xi, Peng,&Fu, Baiheng.(2019).Pressure Pulsation Characteristics of the Cascade and Its Impact on Flow-induced Noise.Jixie Gongcheng Xuebao/Journal of Mechanical Engineering,55(8),225-232.
MLA	Li, Rennian,et al."Pressure Pulsation Characteristics of the Cascade and Its Impact on Flow-induced Noise".Jixie Gongcheng Xuebao/Journal of Mechanical Engineering 55.8(2019):225-232.