阻塞流下阀门内漏率的声学检测与计算

通过对3种阀门在阻塞流下气体内漏的声学检测实验研究,分析阻塞流下气体内漏率与声源振幅的关系,得出二次截流对内漏声源强度的影响规律,提出采用临界阻塞点(n=1.893)声源振幅计算阻塞流下阀门内漏率,并拟合得到实验阀门压比与声振幅的计算式。另外,还采用k-ε二方程湍流模型模拟3种实验阀门的内漏流场,证明了闸阀和球阀内漏过程中存在二次截流现象。

Inspection and Calculation of Acoustics of the Inner Leakage Rate of the Valves Under Barrage Flow

The relation between the inner leakage rate of gas of the valves under barrage flow and the vibration amplitude of acoustic source was analyzed, the influence law of the second interception on the strength of inner leakage acoustic source was derived, it was suggested that the vibration amplitude of acoustic source at the critical barrage point (n=1.893) should be used to calculate the inner leakage rate of the valves under barrage flow, the formulae of the pressure ratio of the experimental valves and the vibration amplitude of acoustic source were obtained by fitting through the experimental investigation on the acoustic inspection of the inner leakage of gas of three kinds of valves under barrage flow . In addition, the flow field of the inner leakage of three kinds of experimental valves was simulated using the turbulent flow model of k-ε equation, it was verified that there was the second interception in the inner leakage processes of gate valves and spherical valves.