脉冲爆震发动机尾喷管的实验

Experimental investigation on pulse detonation engine nozzles

选取3类10种有代表性的脉冲爆震发动机尾喷管进行了试验.研究结果表明,各种喷管对性能均有提高;对每类喷管均存在一最佳面积比,使推力增益最大;在受试的尾喷管中,收敛-扩张喷管增益最大,达24%;填充系数对喷管性能增益影响甚微.

10 nozzles from 3 typical types are chosen under experimental tests. The results show that all nozzles can augment the thrust of baseline pulse detonation engine（PDE） and there is an optimal nozzle area ratio where thrust augmentation is maximized. Amongst all tested nozzles,the maximal augmentation of 240/00 is attained by a convergent-divergent nozzle. Moreover,it is validated that fill-fraction has little effect on thrust augmentation.