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<p>In order to investigate the flow pattern of water jet entering the film cooling holes and the formation process of&#xa0;water jet-guided laser (WJGL) processing film cooling holes, this paper takes the closed-loop groove as the research object and conducts fluid numerical simulation and WJGL processing experiments. Firstly, fluid numerical simulation experiments were conducted to reveal the flow pattern of water jets entering closed-loop grooves with different excircle diameter, width, depth, adjacent edge angles, and bottom shapes. Secondly, closed-loop grooves with different depths, excircle diameter, width, and adjacent edge angles are processed using WJGL technology, and the morphology of the processed closed-loop grooves is characterized using industrial computerized tomography (CT). Finally, the reasons for the formation of closed-loop groove morphology were discussed based on simulation results and machining results. The experimental results indicate that the influence of closed-loop groove morphology on the stability of water jet inside the groove cannot be ignored. The spiral drilling method is more suitable for WJGL machining of film cooling holes compared to the trepanning drilling method.</p>

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Numerical and experimental study on water jet-guided laser machining of closed-loop groove

  • 期刊论文

  • 发表日期：

    2025年2月15日

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  • Jinsheng Liang,
  • Hongchao Qiao,
  • Jibin Zhao,
  • Zhihe Cao,
  • Shunshan Wang,
  • Yuting Zhang

摘要

In order to investigate the flow pattern of water jet entering the film cooling holes and the formation process of water jet-guided laser (WJGL) processing film cooling holes, this paper takes the closed-loop groove as the research object and conducts fluid numerical simulation and WJGL processing experiments. Firstly, fluid numerical simulation experiments were conducted to reveal the flow pattern of water jets entering closed-loop grooves with different excircle diameter, width, depth, adjacent edge angles, and bottom shapes. Secondly, closed-loop grooves with different depths, excircle diameter, width, and adjacent edge angles are processed using WJGL technology, and the morphology of the processed closed-loop grooves is characterized using industrial computerized tomography (CT). Finally, the reasons for the formation of closed-loop groove morphology were discussed based on simulation results and machining results. The experimental results indicate that the influence of closed-loop groove morphology on the stability of water jet inside the groove cannot be ignored. The spiral drilling method is more suitable for WJGL machining of film cooling holes compared to the trepanning drilling method.