title: Numerical Simulation of Flow-Induced Noise in High Pressure Reducing Valve.
abstract: The main objective of this paper is to study the characteristics of flow-induced noise in high pressure reducing valve (HPRV) and to provide some guidance for noise control. Based on computational fluid dynamics (CFD), numerical method was used to compute flow field. Ffowcs Williams and Hawkings Model was applied to obtain acoustic signals. The unsteady flow field shows that noise sources are located at the bottom of plug for valve without perforated plate, and noise sources are behind the plate for valve with perforated plate. Noise directivity analysis and spectrum characteristics indicate that the perforated plate could help to reduce noise effectively. Inlet pressure has great effects on sound pressure level (SPL). The higher inlet pressure will lead to larger SPL at high frequency. When the maximum Ma is close to 1, SPL at low frequency becomes very high.
authors.affiliation: Institute of Process Equipment, Zhejiang University, Hangzhou, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Wei
authors.affiliation: Technical Development Department, Ningbo Special Equipment Inspection Center, Ningbo, China.
authors.forename: Guorong
authors.initials: G
authors.lastname: Zhu
authors.affiliation: Institute of Process Equipment, Zhejiang University, Hangzhou, China.
authors.forename: Jinyuan
authors.initials: J
authors.lastname: Qian
authors.affiliation: Institute of Process Equipment, Zhejiang University, Hangzhou, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Fei
authors.affiliation: Institute of Process Equipment, Zhejiang University, Hangzhou, China.
authors.forename: Zhijiang
authors.initials: Z
authors.lastname: Jin
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D003198:Computer Simulation; D057446:Hydrodynamics; D008962:Models, Theoretical; D009622:Noise; D011312:Pressure