V型球调节阀涡流噪声模拟及降噪设计

Vortex noise simulation and noise reduction design of V-shaped ball regulating valve

针对V型球调节阀流制噪声过大的问题,通过大涡模拟和声比拟方程相结合的方法,对V型球调节阀的内外声场进行了三维仿真模拟以及试验测试,研究了阀门涡流噪声分布特征。研究发现,高声压级频率集中在0~1200 Hz,在整个频段上声壁面压力脉动(AWPF)对噪声贡献远高于湍流壁面压力脉动(TWPF)。基于涡声理论探究了V型球阀芯的开孔参数对噪声的影响,改进后的阀门流致噪声下降了约10 dB(A)。研究结果可为低噪声V型球调节阀的设计提供计算方法和优化方向。

For the problem of excessive flow noise in V-shaped ball regulating valves,a combination of large eddy simulation and acoustic analogy equation was used to conduct three-dimensional simulation and experimental testing of the internal and external sound fields of V-shaped ball regulating valves.The distribution characteristics of valve eddy current noise were studied.Research has found that high sound pressure level frequencies are concentrated between 0 and 1200 Hz,and the contribution of acoustic wall pressure pulsation(AWPF)to noise is much higher than that of turbulent wall pressure pulsation(TWPF)throughout the entire frequency band.Based on the vortex sound theory,the influence of the opening parameters of the V-shaped ball valve core on noise was investigated,and the flow induced noise of the improved valve was decreased by about 10 dB(A).The research results can provide calculation methods and optimization directions for the design of low noise V-shaped ball regulating valves.