Volume 37 Issue 3
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TAN Wenhao, ZHENG Longxi, LU Jie, WANG Lingyi, HUANG Kang. Experiment on combustion characteristics of U-bend pulse detonation combustor under high temperature inlet stream[J]. Journal of Aerospace Power, 2022, 37(3): 502-510. doi: 10.13224/j.cnki.jasp.20210159
Citation: TAN Wenhao, ZHENG Longxi, LU Jie, WANG Lingyi, HUANG Kang. Experiment on combustion characteristics of U-bend pulse detonation combustor under high temperature inlet stream[J]. Journal of Aerospace Power, 2022, 37(3): 502-510. doi: 10.13224/j.cnki.jasp.20210159
shu

Experiment on combustion characteristics of U-bend pulse detonation combustor under high temperature inlet stream

doi: 10.13224/j.cnki.jasp.20210159
  • 1.

    School of Power and Energy，Northwestern Polytechnical University，Xi'an 710129，China

  • 2.

    Aerospace Technology Institute，China Aerodynamics Research and Development Center，Mianyang Sichuan 621000，China

  • Received Date: 2021-04-08
  • Publish Date: 2022-03-28
    Abstract
  • In order to obtain the combustion characteristics of gas-liquid two-phase multi-cycle U-bend pulse detonation combustor （U-PDC） under high temperature inlet stream，experimental research was carried out by using gasoline and air as fuel and oxidant.The results indicated that the U-PDC can achieve stable operation at the working frequency of 15-38 Hz when the inlet temperature was 373 K，and the deflagration to detonation transition （DDT） distance was shortened when the working frequency increased.When the working frequency was 15-25 Hz，the detonation initiation failed at room temperature.The results showed that high temperature inflow can promote the DDT process.At room temperature and working frequency of 15-25 Hz，due to the uneven distribution of combustible gas in the U-bend detonation tube，the time when the flame was detected outside of the U-bend detonation tube was later than the exit of the U-bend detonation tube.When the inflow temperature increased to 373 K，the phenomenon was obviously improved.In addition，the ignition time of U-PDC was within 3-10 ms，which was greatly affected by ignition delay time.When the working frequency of U-PDC was the same and the inlet stream temperature raised from room temperature to 373 K，the wave velocity increased，and the ignition time decreased.

     

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