The Flow Noise Characteristics of a Control Valve
نویسندگان
چکیده
Using the enterprise’s valve as the research object, the research shows the characteristics of the flow field and noise of the valve. The theory of LES and Lighthill acoustic analogy is applied to study the flow noise characteristics of 100% opening and 70% opening of valve in the same flow. The result shows that the region of variation about pressure and velocity is concentrated in the valve sleeve window. The sound pressure spectrum characteristics of the same group of monitoring points are similar, when they are in low frequency. Acoustic pressure amplitude is relatively small, when monitoring points are in high frequency. When the valve opening decreases, because of the throttle effect of valve windows, the whole dB SPL of valve becomes strong. The noise outside of valve has dipole characteristics.
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