Title: Large eddy simulation studies of two-phase flow characteristics in the abrasive flow machining of complex flow ways with a cross-section of cycloidal lobes

Authors: Junye Li; Tuo Sui; Xiwei Dong; Fengshou Gu; Ningning Su; Jianhe Liu; Chengyu Xu

Addresses: School of Electromechanical Engineering, Changchun University of Science and Technology, Changchun, 130022, Jilin, China ' School of Electromechanical Engineering, Changchun University of Science and Technology, Changchun, 130022, Jilin, China ' School of Electromechanical Engineering, Changchun University of Science and Technology, Changchun, 130022, Jilin, China ' Centre for Efficiency and Performance Engineering, University of Huddersfield, Queensgate, Huddersfield, West Yorkshire, HD1-3DH, UK ' School of Electromechanical Engineering, Changchun University of Science and Technology, Changchun, 130022, Jilin, China ' School of Electromechanical Engineering, Changchun University of Science and Technology, Changchun, 130022, Jilin, China ' School of Electromechanical Engineering, Changchun University of Science and Technology, Changchun, 130022, Jilin, China

Abstract: To accurately analysis and improve the performance of abrasive flow machining (AFM) in machining complex and special-shaped channel-parts, this study carried on a digital twin analysis, integrated with numerical and experimental approaches of cycloid special-shaped inner curved workpieces. The different sub-grid models are analysed and compared through large eddy simulation (LES), and the influence of processing factors is explored via the simulation and verified through experiments. The numerical results show that the dynamic kinetic energy sub-grid scale model can reflect the turbulent characteristics in the channel more accurately. The orthogonal test results show that the workpiece surface quality under AFM is greatly improved, and the surface roughness is reduced from 1.635 μm to 0.305 μm under the best combination of processing parameters. It reveals the fundamental behaviour of surface material removal and provide basis for the AFM processing of the special-shaped inner surface polished.

Keywords: special-shaped inner curved; large eddy simulation; LES; sub-grid model; surface roughness.

DOI: 10.1504/IJHM.2022.123131

International Journal of Hydromechatronics, 2022 Vol.5 No.2, pp.136 - 166

Received: 18 Oct 2021
Accepted: 23 Dec 2021
Published online: 30 May 2022 *