Numerical simulation of flow field in the Invar alloy laser–MIG hybrid welding pool based on different heat source models
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 3 April 2018
Abstract
Purpose
The purpose of this paper is to establish a three-dimensional flow field model of the Invar alloy laser–metal inert gas (laser–MIG) hybrid welding process to investigate the influence of different heat sources between different layers and to analyze the flow field based on the two different heat source models for the multilayer welding.
Design/methodology/approach
The Invar steel plates with 19.5 mm thickness are welded into three layers’ seam using the hybrid laser–MIG welding technology. The flow field based on different heat source models is studied and then used to investigate the influence of different heat sources in different layers during the laser–MIG hybrid welding process. The simulation results of flow field using two different heat source models are compared with experiments.
Findings
The flow field simulations results show that using the Gaussian rotating body heat source model to simulate the temperature field is more consistent with the experiment of the hybrid laser–MIG welding where its flow field between different layers better reflects the characteristics of the hybrid laser–MIG welding.
Originality/value
The findings will be useful in the study of a variety of thick-plate laser–MIG hybrid welding process fluid flows.
Keywords
Acknowledgements
The authors gratefully acknowledge the financial support of the project from the Fundamental Research Funds for the Central Universities (Grant NS2015058).
Citation
Zhan, X., Zhang, Q., Wang, Q., Chen, J., Liu, H. and Wei, Y. (2018), "Numerical simulation of flow field in the Invar alloy laser–MIG hybrid welding pool based on different heat source models", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 28 No. 4, pp. 909-926. https://doi.org/10.1108/HFF-02-2017-0069
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited