Numerical Simulation of Liquid-Solid Two-Phase Flow Field in Discharge Gap of High-Speed Small Hole EDM Drilling

Abstract:

The flow field characteristics have a significant effect on the machining stability in high-speed small hole EDM drilling. Thus, Lagrangian discrete phase model (DPM) has been developed to simulate the gap liquid-solid two-phase flow field. The numerical calculation is based on the standard k-ε turbulent model, and the SIMPLEC algorithm is used in the simulation. All the governing equations are solved by software Fluent 6.2. Through numerical simulation, the pressure distribution, the velocity distribution of the dielectric liquid, traces of debris particles, and the debris particle concentration were obtained. The flow field characteristics under different pressures and drilling depths were obtained through simulations. Finally, experiments were carried out to investigate the effects of the flush velocity at exit obtained through simulation on material removal rate (MRR).

• Periodical: Advanced Materials Research (Volumes 53-54)
• Pages: 409-414
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.53-54.409
• Online since: July 2008
• Authors: Y.Q. Wang, Ming Rang Cao, Sheng Qiang Yang, Wen Hui Li
• Keywords: Electro Discharge Machining (EDM), Material Removal Rate (MRR), Numerical Simulation, Small Hole, Two-Phase Flow Field

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