CAJ | 학술논문

为了研究喷管角度对脉冲爆震发动机性能的影响，以丙烷和空气分别为燃料和氧化剂，对采用不同收敛角和扩张角喷管的脉冲爆震发动机工作过程进行了单循环数值模拟。研究结果表明，收敛喷管的收敛角和扩张喷管的扩张角对脉冲爆震发动机性能的影响规律是不同的。收敛喷管出口要比扩张喷管出口更早地形成膨胀波系，扩张喷管出口膨胀得要比收敛喷管出口膨胀得更为充分。对于收敛喷管而言，无论收敛角度如何变化，都会有正的推力增益；对于扩张喷管，当扩张角度超过9°时，就会产生负的推力增益。喷管收敛角为9°时的脉冲爆震发动机性能较好。
위료연구분관각도대맥충폭진발동궤성능적영향，이병완화공기분별위연료화양화제，대채용불동수렴각화확장각분관적맥충폭진발동궤공작과정진행료단순배수치모의。연구결과표명，수렴분관적수렴각화확장분관적확장각대맥충폭진발동궤성능적영향규률시불동적。수렴분관출구요비확장분관출구경조지형성팽창파계，확장분관출구팽창득요비수렴분관출구팽창득경위충분。대우수렴분관이언，무론수렴각도여하변화，도회유정적추력증익；대우확장분관，당확장각도초과9°시，취회산생부적추력증익。분관수렴각위9°시적맥충폭진발동궤성능교호。
In order to investigate the effects of nozzles with different angles on PDE performance, PDE with nozzles of different convergent and divergent angles was simulated and propane?air mixture was used. The simulation results indicated that the effects of nozzles with different angles on PDE performance were not the same. While a series of expansion wave appeared earlier in the outlet of the convergent nozzle, the gas expanded perfect in the outlet of the divergent nozzle. For the PDE with convergent nozzle, the thrust augmentation was always positive no matter how the convergent angle changed. For the PDE with a divergent nozzle, there was a thrust loss with a divergent angle of over 9°. When the nozzle convergent angle was 9°,PDE obtained the highest performance.