发射筒口燃气压力波数值模拟及实验验证

Numerical Simulation and Experimental Verification of Gas Pressure Wave at the Exit of Launching Tube

文章利用气泡脉动理论对筒口燃气脉动规律进行了分析,采用VOF多相流模型和k-ε湍流模型,对导弹水下发射时筒口燃气脉动压力波进行了数值模拟,并利用实验数据进行了验证。结果表明,数值模型与实验数据比较接近,在一定程度上反映了筒口压力波的变化规律,为水下发射环境研究探索了一种新的方法。

The introduction of the full paper outlines our research, which is explained in sections 1, and 2. Section 1 is entitled calculation method; subsection 1.1 is entitled geometrical configuration and its mesh; subsection 1.2 is entitled boundary conditions and initial conditions; subsection 1.3 is entitled numerical simulation model; subsection 1.3.1 is entitled gas-liquid two-phase flow model; subsection 1.3.2 is entitled k-ε turbulence model. Section 2 is entitled verification of calculation method ; its core consists of： （ 1 ） we did pool experiments on the under2 water launching of a model missile, during which we photographed the pulsant of a bubble with a high-speed camera and monitored the pressure wave at the exit of launching tube; （2） we compare our simulation results with experimental results; the comparison results indicate preliminarily that the formation, expansion and contraction of the bubble simulated with our method agree qualitatively with those obtained through experiments.