Multi-physical field analysis of tunnel ECM employed Realizable k-ε model

ZHANG Juchen; LI Shicheng; LIU Yang; LI Xinglin

doi:10.7527/S1000-6893.2021.25670

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2022 , Vol. 43 >Issue 4: 525670 - 525670

DOI: https://doi.org/10.7527/S1000-6893.2021.25670

Articles

Multi-physical field analysis of tunnel ECM employed Realizable k-ε model

ZHANG Juchen ,
LI Shicheng ,
LIU Yang ,
LI Xinglin

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1. College of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China;
2. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China

Received date: 2021-04-13

Revised date: 2021-05-09

Online published: 2021-12-01

Supported by

Natural Science Foundation of Anhui Province (2008085QE250); China Postdoctoral Science Foundation (2018M642246); Natural Science Foundation of Jiangsu Province (BK20190419)

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Abstract

Tunnel ECM is a key process that affects the machining accuracy of blisk ECM of which the forming model is difficult to establish. In this paper, a two-phase flow model based on Realizable k-ε model is established, and a multi-physical field coupling model is built based on the parameter relationship of tunnel ECM. The parameter distribution of temperature, hydrogen volume fraction and electrolyte conductivity in the process and their influence on the surface quality were analyzed by simulation, which shows the vortex region in the side gap increases hydrogen volume and electrolyte temperature. This phenomenon affects the surface quality, decreases the material removal rate, and is verified by the experiments. The balance gaps obtained by simulation and experiment are 0.33 mm and 0.26 mm. Thus the relative error of simulation (27%) is much lower than that of theoretical calculation (73%). Therefore, the model is consistent with the forming process and reflects the influence of machining parameters on the workpiece forming of blisk tunnel ECM.

Key words： ECM; tunnel; multi-physical field coupling simulation; balance gap; machining quality

Cite this article

ZHANG Juchen , LI Shicheng , LIU Yang , LI Xinglin . Multi-physical field analysis of tunnel ECM employed Realizable k-ε model[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022 , 43(4) : 525670 -525670 . DOI: 10.7527/S1000-6893.2021.25670

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