多级降压疏水调节阀流致噪声数值模拟研究

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Abstract

The high noise that occurs during the operation process of high-parameter control valves in special working conditions is one of the important issues that must be considered in the valve’s parametric design and optimization design.Based on the flow-induced theory, the RNG k-ε method and BEM were jointly used to simulate and study the influences of elements parameters of a multi-stage steam trap on the sound pressure, distribution and spectrum characteristics of flow induced noises.The results show that the throttling zones, where the pressure pulsation is the strongest, are the main sound source of flow-induced noise; the flow induced noises in the control valves with different sleeve structure parameters; are all of distinct broad spcetrum characteristics; the sound pressure level (SPL) of the noise rises as the sleeve diameter increases, which means that the sleeve with smaller diameter could curb the flow-induced noise better; the SPL decreases first and then increase as the sleeve clearance increases, when the sleeve clearance is 8 mm, the SPL reaches its minimum 51.02 dB(A).

Key words： high pressure-drop multi-level sleeve control valve elements parameter flow-induced noise spectrum characteristic

Received: 10 October 2018 Published: 15 July 2020

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	Articles by authors
	LI Shuxun1
	2
	KANG Yunxing1
	2
	MENG Lingqi1
	2
	PAN Weiliang1
	2
	ZHANG Wannian1
	2
	LIU Taiyu1
	2

Cite this article:

LI Shuxun1,2,KANG Yunxing1, et al. Flow-induced noise of a high pressure drop control valve[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(14): 116-121.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I14/116

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