Numerical Simulation of Underground Pipeline Leakage Noise
Abstract
In this study, the leakage noise and the pressure field generated by the underground pipeline leakage were calculated by the Computational Fluid dynamics (CFD) software ANSYS Fluent based on the Ffowcs Williams_x005f_x0002_Hawkings (FW-H) equation and Large Eddy Simulation (LES). Different leakage hole shape were carried out in the simulation. Weconsidered two conditions for the pipeline: the pipeline was surrounded by the air and the soil simulated by the porous materia. The second one was closer to the real situation. In the first condition, the results demonstrated that the aerodynamic noise frequency mainly ranged from 0 Hz to 500 Hz that was in good agreement with the literature. The thin and ellipse shape with larger pressure loss got the maximum overall sound pressure level (OASPL) due to stronger interaction between the wall and the fluid. The farther the receiver was from the leakage, the OASPL obtained by the receiver was lower. In the second condition, the frequency range was mainly distributed under 300 Hz and was different from the first condition. Besides, the OASPL was also lower than the first condition. These results were due to the soil characteristics of reducing velocity and pressure that contributed to lower wall stress and pressure variation.
Event details
- Event
- FLOMEKO 2022
- Technical Committee
- TC9
- lich@nim.ac.cn
- Place
- Chongqing, CHINA
- Time
- 1 November 2022 - 4 November 2022
- Website
- http://flomeko2022.msmk.tech/c/index.html