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Volume 45 Issue 5
May  2019
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Journal of Beijing University of Aeronautics and Astronautics  > 2019  >  45(5): 989-998.
Shen Haifeng, Yuan Xiugan. Simulation experiment on air flow and heat transfer of fight plane’s cockpit[J]. Journal of Beijing University of Aeronautics and Astronautics, 2009, 35(9): 1108-1112. (in Chinese)
Citation: WANG Jinjin, ZHA Bailin, ZHANG Wei, et al. Effect of air-inlet structures on combustion and flow field of inner wall in secondary combustion chamber of solid rocket ramjet[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(5): 989-998. doi: 10.13700/j.bh.1001-5965.2018.0525(in Chinese)
shu

Effect of air-inlet structures on combustion and flow field of inner wall in secondary combustion chamber of solid rocket ramjet

doi: 10.13700/j.bh.1001-5965.2018.0525
  • 1.

    College of Missile Engineering, Rocket Force University of Engineering, Xi'an 710025, China

  • 2.

    School of Measuring and Optical Engineering, Nanchang Hangkong University, Nanchang 330063, China

Funds:

Explosives and Propellants Major Project 

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  • Corresponding author: ZHA Bailin, E-mail:zhabailin@163.com
  • Received Date: 05 Sep 2018
  • Accepted Date: 11 Jan 2019
  • Publish Date: 20 May 2019
    Abstract

  • In order to study the effect of air-inlet structures on combustion and ablation combustion chamber of solid ramjet, the flow field characteristics in the secondary in the secondary combustion chamber of solid rocket ramjet with bilateral 180° air-inlet structure and bilateral 90° air-inlet structure on both down sides were analyzed based on the standard k-ε turbulence model, a one-step eddy-dissipation combustion model and combustion mode of boron particles of KING. The results show that large whirlpools are formed in the secondary combustion chamber with bilateral 180° air-inlet structure, which is beneficial to the mixing and combustion of gas and air. The total combustion efficiency of gas phase is 90% at the outlet of the secondary combustion chamber. Moreover, the erosion due to particles is effectively reduced. In the secondary combustion chamber with bilateral 90° air-inlet structure, condensed phase particles and gas move along the unilateral combustion chamber wall, leading to the uneven distribution of oxygen mass fraction and temperature, which are not conducive to combustion of gas. The total combustion efficiency of gas phase is 74%. Comprehensive destruction due to high-temperature thermal ablation, high-concentration particle erosion, high-velocity jet flushing and thermal stress concentration occurs at the side far from the inlet. The overall performance of the secondary combustion chamber with bilateral 180° air-inlet structure is better than that with bilateral 90° air-inlet structure on both down sides.

     

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