环境压强对水下两相冲压式发动机推力影响的数值模拟研究

文章应用CFD商业软件FLUENT6.3模拟了水下两相冲压式发动机的内流场以及分析了环境压强对发动机内推力的影响.假设流动为稳定流动,空气是不可压缩的并且空气和水之间没有热量交换.在航行速度,环境压强和喷气角度不变的条件下,发动机内推力随着空气的质量流量增大而增大;内推力的动态分量随空气的质量流量增大而增大,静态分量几乎保持不变.在航行速度,通气量和喷气角度不变的条件下,发动机内推力随着环境压强增大而增大;内推力的静态分量随环境压强增大而增大,动态分量几乎保持不变.

Numerical Study about Effect of Ambient Pressure on Inner Thrust of Underwater Two-Phase Ramjet

The inner flow field of the underwater two-phase ramjet was studied numerically by using CFD commercial software FLUENT 6.3.The effect of ambient pressure on the inner thrust of the ramjet was investigated. A steady flow, with incompressible air and unexchanging heat are consid-ered. At the condition of same gaseous phase injection angle, ambient pressure and sail velocity, as the gaseous phase mass flow rate increases, the inner thrust and the dynamic part of the inner force increase, and the static part of the inner force remains almost unchanged. At the condition of same sail velocity,gaseous phase injection angle and mass flow rate, as the ambient pressure increases, the inner thrust and the static part of the inner force increase,and the dynamic part of the inner force remains almost unchanged.