Volume 37 Issue 3
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KONG Xiangzhuang, HE Wu, GUO Zhihui. Spray characteristics of liquid jet in nonuniform crossflow[J]. Journal of Aerospace Power, 2022, 37(3): 534-544. doi: 10.13224/j.cnki.jasp.20210151
Citation: KONG Xiangzhuang, HE Wu, GUO Zhihui. Spray characteristics of liquid jet in nonuniform crossflow[J]. Journal of Aerospace Power, 2022, 37(3): 534-544. doi: 10.13224/j.cnki.jasp.20210151
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Spray characteristics of liquid jet in nonuniform crossflow

doi: 10.13224/j.cnki.jasp.20210151

  • National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics，School of Energy and Power Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100191，China

  • Received Date: 2021-04-06
  • Publish Date: 2022-03-28
    Abstract
  • Spray characteristics of liquid jet in nonuniform velocity distribution crossflow were experimentally studied.The nonuniform velocity distribution was produced by perforated plates，the images of spray were captured with a light sheet and a single lens reflex camera，and a phase Doppler particle analyzer （PDPA） was used to measure droplets diameter and velocity.The experimental results indicated that，in the nonuniform crossflow，the bending state and breakup regime of each jet section were different，resulting in the difference of penetration and spray characteristics.Compared with uniform corssflow，the jets penetrated further into the crossflow when the column breakup height increased，and the concentration distribution was more uniform when the velocity distribution was in positive gradient，in addition，the jet presented a flat thrown profile.When the velocity gradient was negative，the spray field moved inward and presented a stratified structure，the jet wake region elongated，and the profile of jet was in collapse state.Correlations of a liquid jet for nonuniform crossflow are presented.Nonuniform crossflow can improve atomization and uniformity，and Sauter mean diameter （SMD） reaches a minimum value when the velocity distribution is negative gradient.

     

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