Numerical Simulation of Inverted Bucket Steam Valve Noise based on Multiband Analysis

Zhao, M.; Liu, D.; Hou, J.; Zhang, X.; Li, S.

doi:10.47176/jafm.17.05.2287

Numerical Simulation of Inverted Bucket Steam Valve Noise based on Multiband Analysis

Document Type : Regular Article

Authors

¹ Lanzhou University of Technology, Lanzhou, 730050, China

² Machinery Industry Pump Special Valve Engineering Research Center, Lanzhou, 730050, China

10.47176/jafm.17.05.2287

Abstract

As an important control element in steam heating piping systems, the safety and stability of inverted bucket steam valves determine the reliable operation of the system. Therefore, it is necessary to investigate the acoustic mechanism of inverted bucket steam valves. Aiming at the difficulty of numerical simulation in accurately predicting the aerodynamic noise of inverted bucket steam valves, this paper proposes a new method for simulating the aerodynamic noise of inverted bucket steam valves based on multiband analysis (LES). The flow field of the inverted bucket steam valve is numerically simulated using the LES method to obtain wall pressure pulsation information and fluid velocity pulsation information, which are used as excitation sources for acoustic simulation. The characteristics of dipole and quadrupole sound sources were obtained by applying the FW-H method and experimentally verified. The results show that a new multifrequency band analysis method for inverted bucket steam valves is effective by comparing the numerical simulation results, in which the dipole source dominates in the low-frequency band, in the medium frequency range, the quadrupole source outperforms the dipole source, but in the high frequency range, the quadrupole source is dominant. The experimental results are in good agreement with the simulation results, and the correctness of the numerical simulation is confirmed by the fact that there is less than a 3% difference between the findings of the numerical simulation and the experimental data.

Keywords

Main Subjects

Acoustics

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