双股射流撞击雾化的数值模拟研究

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中图分类号：TK121 文献标志码：A

Numerical simulation of double jet impact atomization

SUN Yaling， DAl Qingwen， LI Shuxian， WANG Ying （Schoolof EnergyandPower Engineering， UniversityofShanghaiforScienceandTechnology，Shanghai 2Oo93，China）

Abstract： Plain orifice impinging injectors are widely used atomization devices characterized by a simple structure and low manufacturing cost. Their atomization process is achieved through the impingement of two jets. In this study， a coupled VOF-to-DPM multiphase flow model， combining the volume of fluid method with the Eulerian-Lagrangian approach， was employed to numerically simulate the atomization process of two impinging jets. The reliability of the numerical simulation was validated by comparing the calculated breakup lengths of the post-impingement liquid sheet with experimental data and numerical results from the literature. The results indicate that a fan-shaped liquid sheet forms after the impingement of the two jets. The velocity on both sides along the impingement line is approximately equal to the jet velocity and exhibits an axisymmetric distribution， while the velocity component in the Z. -axis direction shows an approximately centrosymmetric distribution. Furthermore， a smaller jet orifice diameter results in a thinner liquid sheet and greater instability， thereby promoting primary breakup and secondary atomization， which leads to enhanced atomization performance.

Keywords： gas-liquid flow; numerical simulation; VOF-to-DPM; primary breakup; secondary atomization

液体火箭发动机是弹道导弹、运载火箭、航天器和航天飞机的主要动力来源与发展重点，其性能直接决定了航天飞行系统的先进程度。（剩余12189字）