Flow Field and Noise Characteristics of Hydrogen Cooler Circuit Regulating Valve During Opening and Closing Process

doi:10.11885/j.issn.1674-5086.2020.09.09.04

Abstract

Abstract: In order to study the flow and hydraulic noise characteristics of the regulating valve installed in a conventional island hydrogen cooler circuit during opening and closing process, computational fluid dynamics method is used to capture the flow details in the flow field. The hexahedral and tetrahedral mixed grids are used to discrete the flow field of pipeline and regulating valve. The pressure and velocity quantities are obtained by solving the continuity and N-S equations, the pressure-based solver and SIMPLE scheme are adopted. The standard k-ε turbulence model is applied to close the N-S equation. The opening and closing of valve is realized by parallel user defined function and dynamic mesh technology. The noise characteristics are acquired by an acoustic analog model. The results show, the internal flow field has credible periodicity. The kind of flow indicated noise of regulating valve is typical broadband noise, and the internal noise level is about 8% higher than the downstream area of the regulating valve during the dynamic process. In addition, the overall noise level of the regulating valve elevates with the decrease of the opening, meanwhile, the difference of noise intensity between inside and outside regulating valve increases gradually.

Key words: hydrogen cooler circuit, regulating valve, dynamic mesh, acoustic analog model, computational fluid dynamics

CLC Number:

O351
TL353

ZHANG Yu, HE Chao, YUAN Shaobo. Flow Field and Noise Characteristics of Hydrogen Cooler Circuit Regulating Valve During Opening and Closing Process[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(6): 152-161.

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