航空发动机吞水试验台喷雾系统数值模拟

发布时间：2018-01-15 14:37

  本文关键词：航空发动机吞水试验台喷雾系统数值模拟　出处：《燃气涡轮试验与研究》2016年03期 　论文类型：期刊论文

  更多相关文章： 航空发动机 吞水试验 喷雾系统 雾化效果 数值模拟 欧拉-拉格朗日方法

【摘要】：航空发动机吞水试验中的雨雾环境依靠喷雾系统来实现,喷雾系统能否精确模拟真实大气雨水环境直接关系着试验的可靠性。采用欧拉-拉格朗日粒子追踪方法,对吞水试验台喷雾系统雾化效果的影响因素进行研究。空气相的变化通过求解时均N-S方程得到,离散液滴的变化通过Fluent中的离散相模型进行模拟,液滴的破碎模拟采用Wave模型,碰撞模拟采用O'Rourke模型,传热传质模型采用等温液滴蒸发模型。结果表明:发动机运行状态、喷嘴孔径和喷水量对雾化效果均有影响,但发动机慢车和最大状态时,三者对雾化效果的影响各有不同。
[Abstract]:The rain and fog environment in aero-engine water swallowing test depends on the spray system. Whether the spray system can accurately simulate the real atmospheric and rainwater environment is directly related to the reliability of the experiment. Euler-Lagrangian particle tracing method is adopted. The influence factors of atomization effect of spray system on water swallowing test rig were studied. The change of air phase was obtained by solving the N-S equation. The variation of discrete droplets is simulated by the discrete phase model in Fluent, the Wave model is used to simulate the breakage of droplets, and the Oval Rourke model is used to simulate the collision. The isothermal droplet evaporation model is used in the heat and mass transfer model. The results show that the engine operating state, nozzle aperture and water injection rate have influence on the atomization effect, but the engine slow running and maximum state. The influence of the three factors on the atomization effect is different.
【作者单位】： 北京航空航天大学航空科学与工程学院;
【基金】：航空科学基金(2012024001)
【分类号】：V263.3
【正文快照】： 1引言 飞机在雨雾环境中飞行时,如果发动机吞人大量雨水,会造成机匣局部受冷收缩,致使机匣与叶#之间的间隙减小,从而产生摩擦损坏发动机。此外,也可能使发动机性能恶化,甚至引起压气机喘振、燃烧室媳火。特别是当发动机在慢车状态下工作时, 空气流量较小,雨水占空气质量流量，

本文编号：1428806