| 田晔，郑清平，段肖宁，刘晓日，汝晶.柴油机喷油器喷孔磨粒流加工过程中颗粒形状影响的数值模拟[J].内燃机工程,2020,41(1):80-85. |
| Numerical Simulation of the Effect of Abrasive Shape Factor on Nozzle Abrasive Flow Machining |
| DOI：10.13949/j.cnki.nrjgc.2020.01.011 |
| Key Words:injector nozzle abrasive flow machining discrete phase erosion rate shape factor |
| Author Name | Affiliation | | TIAN Ye,ZHENG Qingping,DUAN Xiaoning,LIU Xiaori,RU Jing | 1.School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401,China
2.Beiyou Electronic Fuel Injection System(Tianjin) Co., Ltd., Tianjin 301700, China |
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| Abstract: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. |
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