作　　者： ; ; ;

机构地区： 中国科学院广州能源研究所

出　　处： 《中国机械工程》 2009年第17期2049-2054,共6页

摘　　要： 以FLUENT6.3为工具,利用RNG湍流k-ε模型,结合增强壁面函数法对微喷管进行了数值计算,分析了喷管出口与探头的距离对探头附近的速度场与探头正面压力场的影响,以及对探头所受冲击力的影响,通过实验对推力值进行了测定并将其与数值计算值进行了对比。数值计算结果和实验结果表明:在相同的喷管进口压力下,随着探头与喷管出口距离的增大,探头受到的冲击力先变大后变小;当喷管出口与探头的距离不变时,随着喷管入口压力的增大,探头所受到的冲击力近似线性增大。 The software FLUENT6.3 was applied to simulate the micro nozzle by using the RNG k-ε model with the enhanced wall treatment. The simulation was employed to study the effects of the distance from thruster exit to the probe on velocity contours nearby the probe, pressure contours in front of the probe and impinging force which the probe was impacted. Also experiments were carried out to testify the simulation thrust force results. The simulation results and experimental results indicate that when the thruster inlet pressure keeps consistent, the impinge force which the probe is impacted increases firstly and then decreases as the distance from the thruster exit to the probe increases, and the impinge force increases linear appropriately with thruster inlet pressure.

关 键 词： 数值计算 冲击力 推力 微喷管

领　　域： [航空宇航科学与技术] [航空宇航科学技术]