摘要
详细介绍了对气相爆轰波沿收缩管道传播时发生Ｍａｃｈ反射的系统研究。管道中安装了不同楔角的楔块，采用了多种气体组分按不同的初压分组进行实验。在烟薰玻璃片上记录到了爆轰波Ｍａｃｈ反射的三波点迹线，其两侧胞格尺寸和密度的变化清晰可见。推算了爆轰波从Ｍａｃｈ反射向规则反射转变的临界角。压力传感器记录了Ｍａｃｈ反射时楔面上压力和速度的变化。上述参数与空气激波Ｍａｃｈ反射作了比较。编制了爆轰波Ｍａｃｈ反射计算程序，检验了ＣＣＷ理论对于爆轰波传播的可用程度，理论值和实验值在楔角不大于３０°时相当吻合。
Systematic investigation on the gaseous detonation waves propagating along a convergent channel with different composition and wedge angle and under different initial pressure was carried out.With specially designed test section of the tube and smoked foil record,the trajectory of triple point of Machreflected detonation wave was recorde for the first time.On the both sides of the trajectory,the change of cell size and cell density is very obvious.The critical angle,at which the transition from Mach to regular reflection of detonation wave is occured,can be estimated.The influence of initial pressure,specific heat ratio of the medium and wedge angle on the Mach reflection was studied.The comparison of Mach reflection of the detonation with the shock wave indicates that CCW theory preforms much satisfactorily in describing the pressure ratio across Mach stem only with a tolerable variation in the angle of the trajectory to the wall.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1998年第1期21-27,共7页
Explosion and Shock Waves
基金
国家自然科学基金
英国文化委员会资助
