脉冲爆震发动机供油自适应规律研究
Research on principle of self-fit control for fuel supply in pulse detonation engine
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摘要: 利用在油路系统的不同位置处设置动态压力传感器来测量PDE工作过程中的油管中瞬时油压曲线的方法,研究PDE工作中的供油自适应规律.研究结果表明,在供油自适应控制中,开始和停止供油取决于PDE内的燃气反压和供油压力的共同作用,燃气反压大于供油压力,停止供油;燃气反压小于供油压力,开始供油.在保持PDE内当量比不变的情况下,一个循环内的供油时间长短只与供油压力有关,与油管长度和工作频率无关,但油管长度越长,损失越大,导致泵后压力越高.Abstract: The principle of fuel supply self-fit control in pulse detonation engine was studied by measuring the instantaneous oil pressure curve with the dynamic pressure sensors located on different sites of fuel line during the operation of PDE.The results show that,startup and stop of fuel supply,under fuel supply self-fit control,depends upon gas counter-pressure in PDEand fueling pressure.Fuel supply begins with gas counter-pressure less than fuel supply pressure,and stops in reverse conditions.Under the same equivalent proportion within PDE,the fuel supply time is related only to the fueling pressure,independent of the length of fuel line and working frequency of PDE.The longer the fuel line,the larger the pressure loss is,thus leading to a higher pressure at the exit of bump.
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Key words:
- aerospace propulsion system /
- pulse detonation engine(PDE) /
- fuel supply /
- self-fit control /
- pressure
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