Volume 29 Issue 10
Oct.  2014
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XU Huan, LI Zhi-qiang, DONG He, YANG Qing, SHAO Xing-chen. Numerical investigation of gas-liquid two-phase cold-flow around bluff-body stabilized burners[J]. Journal of Aerospace Power, 2014, (10): 2393-2401. doi: 10.13224/j.cnki.jasp.2014.10.016
Citation: XU Huan, LI Zhi-qiang, DONG He, YANG Qing, SHAO Xing-chen. Numerical investigation of gas-liquid two-phase cold-flow around bluff-body stabilized burners[J]. Journal of Aerospace Power, 2014, (10): 2393-2401. doi: 10.13224/j.cnki.jasp.2014.10.016
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Numerical investigation of gas-liquid two-phase cold-flow around bluff-body stabilized burners

doi: 10.13224/j.cnki.jasp.2014.10.016

  • 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: 2013-06-24
  • Publish Date: 2014-10-28
    Abstract
  • Based on the variable time interval average method, a multi-scale two-phase turbulent model was put forward and established. Compared with the experiment results, the rationality of the multi-scale gas-liquid two-phase mathematic model, the modeling parameters and interactive mechanism of gas-liquid two-phase flows was proved. Its relative error of drag coefficient was 1.45%, and the fluctuating lift coefficient was 0.323%. This model could also accurately predict vortex shedding characteristics with its relative error of St was 2.17%. However, its relative error of size of the recirculation zone was 2.33%. And the computational results were better than those of the standard k-ε and RNG (renormalization group) k-ε models. Using the multi-scale two-phase turbulent model, the two-phase flow around six different bluff-body stabilized burners was predicted. The computational results show that the ship-shaped and cone-shaped structures have good overall performance in these six different bluff-body stabilized burners. The recirculation zone of ship-shaped structure is larger than cone-shaped by 10.53%. The time-averaged drag coefficient of ship-shaped structure is larger than cone-shaped by 4.776%. The root-mean-square value of fluctuating lift coefficient of ship-shaped structure is smaller than cone-shaped by 44.73%. And by comprehensive comparison, the ship-shaped structure has the best performance.

     

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