Title: CFD analysis of direct-operated poppet relief valve under different parameters and its structure optimisation

Authors: Yong Sang; Pengkun Liu; Xudong Wang

Addresses: School of Mechanical Engineering, Dalian University of Technology, No. 2 Linggong Road, Ganjingzi District, Dalian City, Liaoning Province, China ' School of Mechanical Engineering, Dalian University of Technology, No. 2 Linggong Road, Ganjingzi District, Dalian City, Liaoning Province, China ' School of Mechanical Engineering, Dalian University of Technology, No. 2 Linggong Road, Ganjingzi District, Dalian City, Liaoning Province, China

Abstract: This paper investigates the dynamic characteristics of the direct-operated poppet relief valve (DOPRV) with different parameters and improves its dynamic characteristics by modifying the core. First, a simplified schematic of the valve is introduced; mesh elements, SST k~ω turbulence model and corresponding time step size are selected by comparing the simulation results. Then, simulation is conducted under different nominal diameters, and a suitable range of diameter is determined. Further, an improved structure of the DOPRV is introduced, and the dynamic characteristics of the DOPRV under improved structure are stimulated under different annular clearance, spring stiffness, and pressure jump. The simulation results show that adding annular clearance can largely enhance the dynamic performance of DOPRV and the optimal annular clearance for the 20 mm diameter DOPRV in this paper is 0.2 mm.

Keywords: direct-operated poppet relief valve; dynamic characteristics; structure optimisation; computational fluid dynamics; CFD.

DOI: 10.1504/IJESMS.2023.133941

International Journal of Engineering Systems Modelling and Simulation, 2023 Vol.14 No.4, pp.197 - 205

Received: 04 Aug 2020
Accepted: 15 Dec 2021
Published online: 06 Oct 2023 *

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