Volume 29 Issue 12
Dec.  2014
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Article Navigation >  Journal of Aerospace Power  > 2014  >  29(12): 2824-2829
CAI Wen-xiang, QI Bin, MA Hu, WU Xiao-song, SONG Xiao-dong. Measurement of transient velocity field at exit zone of valve pulse jet engine[J]. Journal of Aerospace Power, 2014, 29(12): 2824-2829. doi: 10.13224/j.cnki.jasp.2014.12.006
Citation: CAI Wen-xiang, QI Bin, MA Hu, WU Xiao-song, SONG Xiao-dong. Measurement of transient velocity field at exit zone of valve pulse jet engine[J]. Journal of Aerospace Power, 2014, 29(12): 2824-2829. doi: 10.13224/j.cnki.jasp.2014.12.006
shu

Measurement of transient velocity field at exit zone of valve pulse jet engine

doi: 10.13224/j.cnki.jasp.2014.12.006

  • 1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;

  • 2. Flight Instructor Training Base, Air Force Aviation University, Bengbu Anhui 233000, China

  • Received Date: 2013-07-27
  • Publish Date: 2014-12-28
    Abstract
  • Advanced TR-PIV (time-resolved-particle image velocimetry) system was used to measure transient velocity field at a Helmholtz-type valve pulse jet engine exit zone. Test results indicate the cyclical evolution process of velocity field and pressure at the exit zone of valve pulse jet engine, and the maximum time-averaged velocity of the engine is not at the nozzle's exit. The vorticity and duration in the exhaust stage was stronger than that in the inspiratory stage. Measured velocity field shows that transient high-temperature combustion gas does not fully expand at the exit plane, but continues to be expanded at the following exit zone, which is disadvantageous for improving the performance of pulse jet engine.

     

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