燃气轮机燃料控制阀气动噪声特性及降噪设计研究

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摘要燃料控制阀是燃气轮机中用于控制燃料流量的关键流程阀门，在全流程运行过程中因阀芯节流设计导致湍流程度增加、诱发气动噪声。为揭示燃料控制阀气动噪声形成机理、提出相应降噪设计方法，本研究采用流体-声学混合计算方法，以200℃甲烷(CH4)为工质，求解了10%-100%共5个开度条件下燃料控制阀的稳态流场；以稳态流场为初始解，求解了燃料控制阀气动噪声计算所需的瞬态流场参数；建立了气动噪声声传播模型，求解了燃料控制阀气动噪声特性；基于多孔消音理论，开展了燃料控制阀降噪设计。研究结果发现燃料控制阀的全方位气动噪声特性呈现出以中高频为主导的连续宽频特性，多孔消音节流设计可有效降低噪声。本研究为抑制控制阀气动噪声提供重要依据。

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	朱志劼1
	徐前1
	范雪飞1
	韦雪阳2
	陈富强2

关键词 ：燃料控制阀, 流动分析, 气动噪声, 降噪, 计算流体力学

Abstract：Fuel control valve is a key flow valve used to control fuel flow in gas turbines. In the whole flow process, turbulence degree increases and aerodynamic noise is induced due to the valve spool throttling design. In order to reveal the formation mechanism of aerodynamic noise of the fuel control valve and propose the corresponding noise reduction design method, this study adopted the hybrid fluid-acoustic calculation method, and took methane (CH4) at 200℃ as the working medium to solve the steady-state flow field of the fuel control valve at five open degrees of 10%-100%. Taking steady flow field as the initial solution, the transient flow field parameters required for aerodynamic noise calculation of fuel control valve are solved. The aerodynamic noise propagation model is established and the aerodynamic noise characteristics of fuel control valve are solved. The noise reduction design of fuel control valve is carried out based on the theory of porous noise reduction. The results show that the omnidirectional aerodynamic noise characteristics of the fuel control valve show continuous broadband characteristics dominated by middle and high frequency, and the multi-hole muffling and throttling design can effectively reduce the noise. This study provides an important basis for suppressing pneumatic noise of control valve.

Key words： fuel control valve flow analysis aerodynamic noise noise reduction computational fluid dynamics

收稿日期: 2023-02-20 出版日期: 2024-04-28

引用本文:

朱志劼1，徐前1，范雪飞1，韦雪阳2，陈富强2. 燃气轮机燃料控制阀气动噪声特性及降噪设计研究[J]. 振动与冲击, 2024, 43(8): 303-309.
ZHU Zhijie1, XU Qian1, FAN Xuefei1, WEI Xueyang2, CHEN Fuqiang2. Aerodynamic noise characteristics and noise reduction design of fuel control valves for gas turbines. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(8): 303-309.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2024/V43/I8/303

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