International Journal of Aeronautical and Space Sciences

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Gas Effect at High Temperature on the Supersonic Nozzle Conception

  • Boun-jad, Mohamed (Department of Mechanical Engineering, Faculty of Technology, University of Blida 1) ;
  • Zebbiche, Toufik (Institute of Aeronautics and Space Studies, University of Blida 1) ;
  • Allali, Abderrazak (Aircraft Laboratory, Institute of Aeronautics and Space Studies, University of Blida 1)
  • Received : 2016.02.09
  • Accepted : 2017.02.23
  • Published : 2017.03.30
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Abstract

The aim of this work is to develop a new computational program to determine the effect of using the gas of propulsion of combustion chamber at high temperature on the shape of the two-dimensional Minimum Length Nozzle giving a uniform and parallel flow at the exit section using the method of characteristics. The selected gases are $H_2$, $O_2$, $N_2$, CO, $CO_2$, $H_2O$, $NH_3$, $CH_4$ and air. All design parameters depend on the stagnation temperature, the exit Mach number and the used gas. The specific heat at constant pressure varies with the temperature and the selected gas. The gas is still considered as perfect. It is calorically imperfect and thermally perfect below the threshold of dissociation of molecules. A error calculation between the parameters of different gases with air is done in this case for purposes of comparison. Endless forms of nozzles may be found based on the choise of $T_0$, $M_E$ and the selected gas. For nozzles delivering same exit Mach number with the same stagnation temperature, we can choose the right gas for aerospace manufacturing rockets, missiles and supersonic aircraft and for supersonic blowers as needed in settings conception.

Keywords

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