静止、流动空-燃混合气的高能点火研究

Investigation on High Energy Ignition of Quiescent and Flowing Air / Fuel Mixtures

在脉冲爆震发动机的实际应用中,高能点火相对于传统的点火方式有利于减少延迟时间、上升时间,缩短爆燃向爆震的转变距离。实验结果显示对于静止混合气延迟时间通常可以减少3倍,对于流动混合气(0.35 kg/s)延迟时间减少超过4倍,并且可以得到其他一些性能上的提高。进一步实验证明,如果反应物的化学当量比合适,则存在一个与其最适应的点火能量可以使爆燃向爆震的转变距离最小。

In the use of pulse detonation engine （ PDE）, using high - energy ignition device, as compared with the traditional methods, is favorable to the reduction in delay time, rise time and deflagration to detonation distance. The experiment shows reduction in delay to ignition by factors of typically 3 in quiescence to more than 4 in a flowing PDE, and other enhancements in performance. And the further experiment shows that if the equivalent ratio of reactants is appropriate, there will be an optimum ignition energy that can make the DDT the shortest.