标准摘要
[中文适用范围]： IEC 60534 的这一部分建立了一种方法来预测控制阀中液体流动产生的噪声以及在阀门下游和管道外部测量的最终噪声水平。噪音可能是由正常湍流和阀门中的液体空化产生的。该方法的部分内容基于声学、流体力学和力学的基本原理。通过试验数据验证了该方法的有效性。 [外文原描述]： IEC 60534-8-4:2015 establishes a method to predict the noise generated in a control valve by liquid flow and the resulting noise level measured downstream of the valve and outside of the pipe. The noise may be generated both by normal turbulence and by liquid cavitation in the valve. Parts of the method are based on fundamental principles of acoustics, fluid mechanics, and mechanics. The method is validated by test data. This third edition cancels and replaces the second edition published 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Hydrodynamic noise is predicted as a function of frequency and b) Elimination of the acoustic power ratio.
英文名称Industrial-process control valves - Part 8-4: Noise considerations - Prediction of noise generated by hydrodynamic flow