气缸式尾翼气缸内压力及影响因素分析

Cylinder Pressure Analysis of Cylinder-Open Fin

根据气体一维准定常流动理论建立了气缸式尾翼气缸充放气理论模型,设计了φ1.8 mm和φ2.0 mm两种气孔直径的气缸式尾翼结构,仿真得到了气缸内压强和气缸内外压强差曲线,结果表明φ1.8 mm方案尾翼能够正常工作,φ2.0 mm方案尾翼存在在膛内提前张开的风险,并得到验证。

A theoretical model of cylinder inflation and deflation for the cylinder-open fin was established based on the one-dimensional quasi-steady flow theory of gas.The influence of pore diameter and cylinder volume on the cylinder pressure was revealed by analyzing the typical internal ballistic pressure curves of the cylinder inflation and deflation.Cylinder-open fin structures with two different pore diameters ofφ1.8 mm andφ2.0 mm were designed respectively.The pressure curves inside the cylinder as well as the pressure difference curves between inside and outside the cylinder were obtained through numerical simulation.The simulation results,which are confirmed by the projectile test,show that the fin with a pore diameter of 1.8 mm can work normally,while the one withφ2.0 mm has the risk of premature opening in the bore.