圆环片扰流器对爆震燃烧特性的影响

在飞行状态下成功实行液态燃料的连续爆震在工程上有较大的难度。通过在爆震管内安装扰流器促进爆震波的形成,并针对不同扰流器结构参数对管内爆震燃烧压力和火焰传播速度的影响开展了实验研究,获得了爆震燃烧特性随扰流器长度、间距和起始位置的变化规律。结果表明:燃烧波峰值压力和火焰传播速度随扰流器片数、间距的增加和起始位置的变大而增大;当在管内产生爆震波后(爆震波峰值压力大于1.4M Pa,火焰传播速度>1 000 m/s),燃烧波压力和火焰传播速度随上述参数的改变变化不大。 

Disturber Affect on the characteristics of Detonation

It is difficult to generate successfully multi-cycle liquid fuel detonation at ambient pressure and temperature conditiions.Using disturber is the simple and efficient way to promote detonation.In this paper,the experimental investigation was conducted at ambient pressure and temperature in the detonation tube(length of 2000mm and inner diameter of 40 mm) to acquire the relationship between the combustion wave pressure,flame velocity and structure parameters of the disturber,including number of disturber pieces(6～14),space(20～80 mm) and starting position(80～200 mm).The experimental results show:(1) it is helpful to promote detonation wave,while adopting more disturber pieces,farther space between disturber pieces and farther starting position of disturber;(2) the combustion wave pressure and the flame velocity will keep constant if the detonation wave is produced in the tube(maximal pressure>1.4 MPa and flame velocity>1 000 m/s).