Title: Virtual wind tunnel modelling and numerical calculation of forklift power compartment based on acoustic-heat-flow multi-physical field coupling

Authors: Enlai Zhang; Jingjing Zhang; Jiahe Lin

Addresses: School of Mechanical and Automotive Engineering, Xiamen University of Technology, Xiamen, 361024, China; College of Chengyi University, Jimei University, Xiamen, 361021, China ' College of Applied Science and Technology, Hainan University, Danzhou, 571737, China ' Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen, 361005, China

Abstract: Considering the contradiction between increasing heat flow density and noise decibel decreasing requirement in forklift power compartment, this paper theoretically analyses the multi-physical field coupling relationship between the sound, heat and flow velocity fields in the non-ideal medium. For the acoustic radiation problem in infinite domain, the perfectly matched layer (PML) boundary is introduced, and a virtual wind tunnel model is established based on finite element method and boundary element method (FEM-BEM). Finally, the sound pressure and temperature distributions of the forklift power compartment are obtained by numerical simulation, and then the calculation accuracy of the established virtual wind tunnel model is verified by tests.

Keywords: forklift power compartment; virtual wind tunnel model; PML; perfectly matched layer; FEM-BEM; finite element method and boundary element method.

DOI: 10.1504/IJVNV.2023.130231

International Journal of Vehicle Noise and Vibration, 2023 Vol.19 No.1/2, pp.1 - 14

Accepted: 04 May 2021
Published online: 10 Apr 2023 *