Volume 37 Issue 3
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CAI Kexin, MAO Junkui, XU Qiming, BI Shuai, WANG Lei, ZHOU Jie. Pulse jet flow response characteristics of cooling pipe with different structures[J]. Journal of Aerospace Power, 2022, 37(3): 523-533. doi: 10.13224/j.cnki.jasp.20200372
Citation: CAI Kexin, MAO Junkui, XU Qiming, BI Shuai, WANG Lei, ZHOU Jie. Pulse jet flow response characteristics of cooling pipe with different structures[J]. Journal of Aerospace Power, 2022, 37(3): 523-533. doi: 10.13224/j.cnki.jasp.20200372
shu

Pulse jet flow response characteristics of cooling pipe with different structures

doi: 10.13224/j.cnki.jasp.20200372

  • College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China

  • Received Date: 2020-09-04
  • Publish Date: 2022-03-28
    Abstract
  • The flow response law of pulse jet through cooling pipe with structural parameters was explored. Under the aerodynamic parameters of pulse frequency of 1 Hz，Reynolds number of 5 000 and pulse jet duty ratio of 50%，the influences of cooling pipe diameter，jet hole diameter，hole spacing on the pulse jet flow response characteristics were analyzed successively and the internal mechanism of the influence of structural parameters on the flow response characteristics of pulse jet in the cooling pipe was comprehensively described.In view of the structural parameters，empirical formulae of the cooling pipe jet quality coefficients with cooling pipe diameter，jet hole diameter，hole spacing were fitted to optimize the array of pulse jet cooling pipe chamber，providing a reference for structure design.It was found that the response time and hysteresis time of cooling pipe jet velocity decreased with the increase of cooling pipe diameter，hole spacing and jet hole diameter.With the increase of cooling pipe diameter，the decrease of jet hole diameter and hole spacing，the pressure in the cooling pipe and the jet velocity coefficient increased，and the flow capacity decreased.

     

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