【作者】

田晔，郑清平，段肖宁，刘晓日，汝晶

【摘要】

中文摘要: 以喷油器喷孔为对象，基于欧拉-拉格朗日法和磨蚀模型对磨粒流研磨过程中的流场及颗粒运动进行了数值模拟,分别得出采用不同形状颗粒时的动压力、湍流动能、颗粒速度、磨蚀速率，探究了颗粒形状因子对研磨结果的影响。研究表明，磨蚀速率同颗粒形状因子成反比关系，采用形状因子较小的颗粒可加快研磨速度，形状因子为0.3的颗粒在喷孔入口处的磨蚀速率最大，比形状因子为0.7的磨蚀速率高出86.6%，颗粒形状对工件表面的磨蚀位置也有较大影响。 英文摘要: Taking an injector nozzle as the research object, the Euler-Lagrange method together with an abrasion model was used to simulate the flow field and abrasive motion during the abrasive flow machining. Then, according to the dynamic pressure, turbulent kinetic energy, abrasive velocity and erosion rate simulated under different abrasive shapes, the influence of abrasive shape factor on erosion effect was explored. Results show that the erosion rate is inversely proportional to the abrasive shape factor. That is to say, use of a smaller abrasive shape factor can increase the erosion rate. The erosion rate with an abrasive shape factor of 0.3 reaches its maximum at the inlet of nozzle, which is 86.6% higher than with an abrasive shape factor of 0.7. Moreover, the shape of abrasive grain also has a relatively large influence on the erosion location of workpiece surface.

【论文集名称】

2020年

【会议名称】

《内燃机工程》

【下载次数】

0

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