Volume 29 Issue 11
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LI Zhen-xiang, GUO Zhi-hui, CHE Jun-long, FU Yu. Flow field and spray of a high shear air-blast nozzle[J]. Journal of Aerospace Power, 2014, 29(11): 2704-2709. doi: 10.13224/j.cnki.jasp.2014.11.022
Citation: LI Zhen-xiang, GUO Zhi-hui, CHE Jun-long, FU Yu. Flow field and spray of a high shear air-blast nozzle[J]. Journal of Aerospace Power, 2014, 29(11): 2704-2709. doi: 10.13224/j.cnki.jasp.2014.11.022
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Flow field and spray of a high shear air-blast nozzle

doi: 10.13224/j.cnki.jasp.2014.11.022

  • 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: 2013-07-19
  • Publish Date: 2014-11-28
    Abstract
  • The flow field and spray characteristics of a high shear air-blast nozzle were investigated numerically and experimentally. Particle dynamics analyzer (PDA) was employed to experimentally study on the velocity field and spray field of the high shear air-blast nozzle under different air-liquid ratios. And through numerical calculation of the flow field of the nozzle, the calculated results agreed with the experimental data. The results show that the design of high shear air-blast nozzle is reasonable. Two swirl air flows could finish strong momentum exchange inside the nozzle, and fuel is highly sheared. The high shear air-blast nozzle can achieve good atomization under wide regulation ratios. When the air-liquid ratio is of 10 times, the Sauter mean diameter distribution of spray is between 20-60μm. With the increase of air-liquid ratio, line averaging Sauter mean diameter decreases. The calculation model of Sauter mean diameter is derived for the nozzle. The results can provide references for high shear air-blast nozzle design.

     

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