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    董脉鸣, 辛红敏, 李光平, 代辉, 程清思, 姚倡锋, 崔敏超. 冷喷涂过程中颗粒加速特性的数值模拟[J]. 机械工程材料, 2024, 48(9): 87-95. DOI: 10.11973/jxgccl230371
    引用本文: 董脉鸣, 辛红敏, 李光平, 代辉, 程清思, 姚倡锋, 崔敏超. 冷喷涂过程中颗粒加速特性的数值模拟[J]. 机械工程材料, 2024, 48(9): 87-95. DOI: 10.11973/jxgccl230371
    DONG Maiming, XIN Hongmin, LI Guangping, DAI Hui, CHENG Qingsi, YAO Changfeng, CUI Minchao. Numerical Simulation of Particle Acceleration Characteristics During Cold Spraying[J]. Materials and Mechanical Engineering, 2024, 48(9): 87-95. DOI: 10.11973/jxgccl230371
    Citation: DONG Maiming, XIN Hongmin, LI Guangping, DAI Hui, CHENG Qingsi, YAO Changfeng, CUI Minchao. Numerical Simulation of Particle Acceleration Characteristics During Cold Spraying[J]. Materials and Mechanical Engineering, 2024, 48(9): 87-95. DOI: 10.11973/jxgccl230371

    冷喷涂过程中颗粒加速特性的数值模拟

    Numerical Simulation of Particle Acceleration Characteristics During Cold Spraying

    • 摘要: 采用ANSYS FLUENT软件建立冷喷涂过程中颗粒沉积的有限元模型,通过颗粒撞击速度的估算公式进行了验证;采用有限元模型开展了载气压力(0.5,0.7,0.9,1.1,1.3 MPa)、载气温度(400,500,600,700,800 K)、喷涂距离(15,20,25,30,35 mm)等工艺参数对颗粒加速特性的单因素影响研究,通过响应曲面法分析工艺参数对颗粒加速特性的交互影响规律。结果表明:不同工艺参数下颗粒撞击速度模拟值与估算值的平均相对误差为5.37%,验证了有限元模型的可靠性。随着载气压力的增加,颗粒速度增大,相邻载气压力下颗粒撞击速度的平均增加幅度为50 m·s−1,颗粒温度变化不明显;随着载气温度升高,颗粒温度升高,相邻载气温度下颗粒撞击温度的平均增加幅度为60 K,颗粒速度变化不明显;随着喷涂距离的增加,颗粒速度和颗粒温度均变化不明显。载气压力对颗粒速度的影响最为显著,载气温度次之,喷涂距离的影响最不显著。载气压力与载气温度的交互作用对颗粒速度的影响最为显著,载气压力与喷涂距离次之,载气温度与喷涂距离交互作用的影响最小。

       

      Abstract: A finite element model of particle deposition during cold spraying was established by ANSYS FLUENT software, and was verified by estimation formula of particle impact velocity. Single factor influence research of gas pressure (0.5,0.7,0.9,1.1,1.3 MPa), gas temperature (400,500,600,700,800 K), and standoff distance (15,20,25,30,35 mm) on particle acceleration characteristics was conducted by the finite element model. The effect of interaction between process parameters on particle acceleration characteristics was analyzed by response surface methodology. The results show that the average relative error between simulated and estimated particle impact velocities under different process parameters was 5.37%, which verified the reliability of the finite element model. With the increase of gas pressure, the particle velocity increased, with the average increase of particle impact velocity under adjacent gas pressure of 50 m · s−1, but the particle temperature did not change significantly. With the increase of gas temperature, the particle temperature increased, with the average increase of particle impact temperature under adjacent gas temperature of 60 K, but the particle velocity did not change significantly. As the standoff distance increased, the particle velocity and particle temperature did not change significantly. The gas pressure had the most significant effect on particle velocity, followed by gas temperature, and the standoff distance had the least effect. The interaction of gas pressure and gas temperature had the most significant effect on particle velocity, followed by the interaction of gas pressure and standoff distance, and the interaction of gas temperature and spraying distance had the least effect.

       

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