Volume 31 Issue 6
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LI Xuan, XU Xu. Design and numerical simulation of oxygen-hydrogen axisymmetric heater with multi-injector[J]. Journal of Aerospace Power, 2016, 31(6): 1511-1520. doi: 10.13224/j.cnki.jasp.2016.06.029
Citation: LI Xuan, XU Xu. Design and numerical simulation of oxygen-hydrogen axisymmetric heater with multi-injector[J]. Journal of Aerospace Power, 2016, 31(6): 1511-1520. doi: 10.13224/j.cnki.jasp.2016.06.029
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Design and numerical simulation of oxygen-hydrogen axisymmetric heater with multi-injector

doi: 10.13224/j.cnki.jasp.2016.06.029

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

  • Received Date: 2014-09-04
  • Publish Date: 2016-06-28
    Abstract
  • In order to meet the working requirement and achieve the uniform parameters of hydrogen-oxygen heater outlet in free jet test stand, the heater was designed into axisymmetric structure, seven injectors with coaxial shear type for injection were adopted. The three-dimensional flow field was calculated by using the CFD simulation software with the hydrogen-oxygen single step reaction model and the parameters under design conditions were obtained. The results demonstrate that: with the increasing ratio of the center nozzle and the periphery nozzle distance L to the injection panel radius R(L/R), the combustion efficiency first increases and then decreases; the injection panel temperature decreases with the growth of L/R, ultimately reache around 600K; the uniformity of oxygen substance concentration and total temperature in heater outlet remains unchanged with L/R approximately; the Mach number in the outlet mainstream is around 6, which can satisfy the working requirement. The good comprehensive performance can be achieved when the influence area of each injector is approximately equal. The velocity ratio of hydrogen to oxygen gets higher, the area completing combustion will be shorter, and the injection panel temperature increases. Compared with the single-injector heater and nineteen-injectors heater, seven-injectors heater is reasonable.

     

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