Volume 37 Issue 4
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ZHANG Botao, LI Ping, YANG Anlong, YANG Baoe. Effects of throttling level on spray characteristics of gas-liquid pintle injector unit[J]. Journal of Aerospace Power, 2022, 37(4): 791-801. doi: 10.13224/j.cnki.jasp.20210235
Citation: ZHANG Botao, LI Ping, YANG Anlong, YANG Baoe. Effects of throttling level on spray characteristics of gas-liquid pintle injector unit[J]. Journal of Aerospace Power, 2022, 37(4): 791-801. doi: 10.13224/j.cnki.jasp.20210235
shu

Effects of throttling level on spray characteristics of gas-liquid pintle injector unit

doi: 10.13224/j.cnki.jasp.20210235
  • 1.

    National Key Laboratory of Science and Technology on Liquid Rocket Engines， Xi'an Aerospace Propulsion Institute， China Aerospace Science and Technology Corporation，Xi'an 710100，China

  • 2.

    Academy of Aerospace Propulsion Technology， China Aerospace Science and Technology Corporation，Xi'an 710100，China

  • Received Date: 2021-05-12
  • Publish Date: 2022-04-28
    Abstract
  • In order to analyze the spray characteristics and spray mechanism of gas-liquid pintle injector unit，the effects of throttling level on spray pattern，volume flow rate distribution，Sauter mean diameter （SMD） distribution and the velocity field were obtained by using backing-lighting photography technique and phase Doppler anemometry （PDA） system for the spray characteristics of gas-liquid pintle injector unit.The results showed that the spray of gas-liquid pintle injector was a fan-shaped form and the spray pattern was presented by shearing breaking.The volume flow rate presented a single peak distribution along the radial direction.With the decrease of throttling level，the edge of spray field shrank to the center.The SMD increased along the radial direction，and the best spay area was distributed in the center and both sides of the spay field.The value of SMD increased with the increasing throttling level.When the momentum ratio was constant，the throttling level had little influence on the variation range of SMD.The axial length of the backflow area below the pintle head decreased with the decreasing throttling level.

     

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