Analysis on the mechanism of aero-acoustic noise generated by gas flow through valves of natural gas pipelines

作者：Liu Cui Wei; Li Yu Xing^*; Wang Wu Chang; Xie Zhu Zhu

来源：Journal of Vibration and Shock, 2014, 33(2): 152-157.

• Computational Fluid Dynamics software
• Fluctuating pressures
• Fluctuating velocities
• Location based
• Software SYSNOISE
• Sound source
• SYSNOISE
• Transient flow fields

In order to distinguish leakage noise and valve noise, a theoretical basis and a database for leak detection and location based on acoustic method were provided and the method to control valve noise was introduced. The aero-noise induced by gas flow through valves in gas pipelines was studied from the view point of sound generation mechanism and an aero-noise model was built from which the rules governing the aero-noise generation, transmission and attenuation were concluded. The transient flow field with fluctuating pressure and fluctuating velocity was obtained with the help of large eddy simulation model by using computational fluid dynamics software when gas flows through valves in gas-pipelines. Then the data were imported into acoustic BEM software SYSNOISE to carry through numerical analysis, to generate noise source terms, including the dipole source and quadrupole source, to build the aero-noise model and finally to solve the aero-acoustics problems.

• 出版日期2014
• 单位中国石油大学（华东）