摘要
采用欧拉-拉格朗日两相流模型对不同过载及颗粒直径条件下的喷管内流场进行了数值模拟。分析了过载的加入和颗粒直径变化对喷管内流场的压强、温度、速度的影响。从结果分析得到:不同过载以及颗粒直径变化对喷管内部燃气压强、温度、速度的影响比较大,特别是对温度的影响尤为明显。在纯气相条件下时,燃气温度在喷管长尾段后部有明显的下降,但随着颗粒相的加入,在喉部附近以及扩张段中,两相流情况下的燃气温度高于纯气相情况下的燃气温度。
Euler-Lagrange two-phase flow model is used to simulate the inner flow field of the tail nozzle pipe under the condition of different high accelerations and particle diameters.At the aspect of the calculation of heat transfer and temperature field,the three heat transferring modes and the respects of each interior area of the nozzle was considered,calculate and analyze the temperature field of the nozzle＇s three-dimensional integral heat structure.The results show that,the change of temperature grads in the nozzle＇s inner wall is prominence in the nozzle macrocosm;the gas temperature of the nozzle tail is higher than the pure gas phase with particles and high acceleration,but it descend rapidly in the thermal protection layer;the radiation heat temperature of the particle in different diameter and high acceleration is prominence.
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2012年第1期1-5,共5页
Journal of Air Force Engineering University(Natural Science Edition)
基金
航空科学基金资助项目(20101356)
关键词
高过载
长尾喷管
数值模拟
High acceleration
tail pipe nozzle
numerical simulation
