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| Numerical simulation and mechanism analysis of gas atomized pulverizing
process for additive manufacturing |
| WANG Changjun1，LIU Yu1，CAO Chengxiang1，LANG Tong1，MAConghui1，XIE Yanjun2 |
| 1Central Iron & Steel Research Institute, Beijing 100081, China; 2 PERA Global, Beijing 100025, China |
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Abstract Using a numerical approach of computational fluid dynamics (CFD), the effects of atomizing gas temperature
and pressure on the supersonic flow field distribution and powder yield were studied in comparison to industrial
production data. The result shows that with the atomized gas increased, the average temperature and velocity
of the atomization area increase, which is theoretically beneficial to the finer powder production. Besides, as the
pressure of the atomized gas increases, the average temperature of atomized region reduces and the average velocity
increases. Furthermore, with the pressure of atomized gas increased, the impact of temperature on the yield of
finer powder gradually weakens, and even resulting in worse powder yield in case of high-pressure atomized gas.
Hereby, the increased yield of finer powder is dominated by the additional pressure of atomized gas. Comprehensively,
the parametric optimization should be carried out to ensure the high production efficiency of finer powder
and reduce the manufacturing cost.
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Received: 11 June 2021
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2021, Vol. 31 
