Volume 26 Issue 3
Mar.  2011
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Article Navigation >  Journal of Aerospace Power  > 2011  >  26(3): 692-697
JIN Ping, DU Zheng-gang, YANG Li-jun, CAI Guo-biao. Research on flow visualization of coaxial gas-gas injector mixing flowfield[J]. Journal of Aerospace Power, 2011, 26(3): 692-697.
Citation: JIN Ping, DU Zheng-gang, YANG Li-jun, CAI Guo-biao. Research on flow visualization of coaxial gas-gas injector mixing flowfield[J]. Journal of Aerospace Power, 2011, 26(3): 692-697.
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Research on flow visualization of coaxial gas-gas injector mixing flowfield

  • School of Astronautics, Beijing University of Aeronautics and Astronautics,Beijing 100191,China

  • Received Date: 2009-12-02
  • Rev Recd Date: 2010-06-12
  • Publish Date: 2011-03-28
    Abstract
  • To pursue the proper design criteria for gas-gas injector,the flow visualization technology with particle image velocimetry(PIV) system was adopted to investigate the mixing mechanism.The coaxial shear and swirl configurations were selected.The results show that the momentum ratio of oxygen to hydrogen prevails in the mixing process of coaxial shear injector,while the swirl numbers dominate the mixing part of coaxial swirl injector.Good mixing was gained at high momentum ratio and high swirl numbers.For the designer,the combination of high annular pressure drop and low center pressure drop is recommended for the coaxial shear injector,and the combination of low annular pressure drop and proper recess length of center post recommended for swirl injector.

     

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