脉冲爆震发动机的蒸发助爆器试验

为使φ180 mm的燃用汽油的气动阀式脉冲爆震发动机成功起爆,设计了几种型式的蒸发助爆器以提高燃油的蒸发率,通过蒸发助爆器内产生爆震波来触发大管内的爆震波。进行了不同蒸发助爆器管内径(φ13mm,φ16 mm,φ29 mm)的试验比较,φ29 mm的蒸发助爆器内装螺旋型钝体与不装螺旋型钝体的试验比较,以及φ29 mm和φ37 mm都装螺旋型钝体的蒸发助爆器试验比较,分析了不同管径及不同结构蒸发助爆器对爆震波产生的影响及机理,及对爆震波压力、推力的影响。结果表明,采用多管形蒸发助爆器可以使PDE成功起爆。在同样堵塞比下,在蒸发助爆器的小管内加螺旋型钝体并增加螺旋形钝体钢丝直径,减小小管壁厚,对降低推力损失有利。 

Experimental Investgation on Vaporized-Detonator in Pulse Detonation Engine

Several types of vaporizeddetonator using multiple tubes in pulse detonation engines were designed to obtain successfull detonation in a gasoline fueled aerovalve PDE with 180 mm diameter.A series of experiments with different structures of vaporized-detonator were carried out,which included comparison tests of different diameters of vaporizeddetonator tubes(φ13 mm,φ16 mm and φ29 mm),identical diameter vaporized-detonator tube(φ29 mm) with and without spirals,and spirals with different vaporized-detonator tube sizes(φ29 mm and φ37 mm).The mechanism of detonation engendering and developing in PDE with vaporized-detonator tubes of different size and structure and their influences on detonation pressure and thrust were analyzed.These results show that PDE with such structure can induce detonation successfully.Under same blockage ratio,increasing the diameter of spring and reducing the wall thickness simultaneously for small tubes in multi-tube detonator is of benefit to net thrust.