蒸汽球閥閥口型線對閥體振動(dòng)噪聲影響的數(shù)值研究

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中圖分類號：TH134 文獻(xiàn)標(biāo)志碼：A

Abstract： Aiming at the problem of flow induced vibration and noise of V-type steam ball valves， a coupled acoustic-vibration simulation method was used to study the influence of valve port profile on the flow field structure in the valve and the noise radiated from the valve body and pipeline. The numerical results show that， in terms of flow field inside the valve， the modified Type A spool has improved flow characteristics compared to the original Type B model，with enhanced flow performance.Meanwhile， the flow velocity inthe valve increases from 310m/s to 320m/s after modification， with more uniform steam flow distribution. Concerning noise radiated from valve bodies and pipelines，the sound pressure level distribution contours of all three steam ball valves exhibit symmetrical distribution along the pipeline， with broadband characteristics in their noise spectra.At the characteristic peak value， the sound pressure level of Type A spool is 76.70dB ， which is 8.43 dB lower than that of Type B. The findings demonstrate that optimizing the valve port profile parameters is a feasible approach for noise reduction.

Keywords： V-type ball valve; flow characteristics; jet flow; vibration and noise; acoustic-vibration coupling

V型球閥是一種具有結(jié)構(gòu)緊湊、調(diào)節(jié)范圍廣、可調(diào)比例可以達(dá)到100：1等優(yōu)良調(diào)節(jié)性能的特殊球閥[1]。（剩余8226字）