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Volume 39 Issue 1
Jan.  2013
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Journal of Beijing University of Aeronautics and Astronautics  > 2013  >  (1): 31-36.
Cheng Cheng, Qin Lizi, Liu Yuet al. Nozzle chemical non-equilibrium effects based on strut combustor[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, (1): 31-36. (in Chinese)
Citation: Cheng Cheng, Qin Lizi, Liu Yuet al. Nozzle chemical non-equilibrium effects based on strut combustor[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, (1): 31-36. (in Chinese)
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Nozzle chemical non-equilibrium effects based on strut combustor

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

  • Received Date: 19 Sep 2011
  • Publish Date: 31 Jan 2013
    Abstract
  • The finite volume method in implicit scheme and surrogate fuel C12H23's 10 species and 13 step reactions Arrhenius finite-rate model were adopted to investigate the non-equilibrium chemical reaction flow in kerosene-fueled scramjet single expansion ramp nozzle (SERN), and the ‘inlet thin layer' problem in SERN model was effectually solved by establishing the strut combustor-SERN model. Numerical simulation results show that the chemical non-equilibrium effect exits in the whole SERN, especially near the nozzle inlet zone; The SERN performance with non-equilibrium chemical reaction flow is obviously higher than that with frozen flow. With the increase of engine equivalent mixture ratio (ε) the δ grows up, which is the percentage of increment about nozzle thrust coefficient and lift coefficient with non-equilibrium chemical reaction flow relative to frozen flow.When the ε=0.8, thrust coefficient increment δCF=9.41%, lift coefficient increment δCY=16.39%, thus the chemical non-equilibrium effect of kerosene-fueled scramjet nozzle cannot be ignored.

     

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