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  • experimental study of an air-breathing pulse detonation engine ejector

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 844
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     experimental studies were performed in order to improve the understanding of the performance of ejector driven by an air-breathing pulse detonation engine (pde) with a convergent nozzle. this research utilized a gasoline-air pde at four different operating frequencies of 8 hz, 10 hz, 12 hz and 15 hz. the performance of pde-ejector was quantified by thrust measurements. the effects of single ejector length and axial location on thrust augmentation were investigated. it was found that the single ejector with l/d of 2 showed the best performance and the maximum thrust augmentation occurred at a downstream placement of +1 tube diameter. the performances of two-stage and three-stage ejectors were also investigated. the results indicated that both the overlap ratio and the flow area between two stages should not be too large. the performance of the two-stage ejector was not as sensitive as single-stage ejector to axial position in current conditions. the three-stage ejector behaved better than the two-stage ejector but worse than the single-stage ejector in this work. a maximum thrust augmentation of 1.8 was obtained with an l/d of 2 at a downstream placement of +1 position and 15 hz operating frequency.

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