Unsteady Processes in Solid Propellant Combustion

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  • Unsteady Processes in Solid Propellant Combustion Book Detail

  • Author : A. Crespo
  • Release Date : 1977
  • Publisher :
  • Genre :
  • Pages : 43
  • ISBN 13 :
  • File Size : 83,83 MB

Unsteady Processes in Solid Propellant Combustion by A. Crespo PDF Summary

Book Description: The purpose of this work is to develop a theoretical analysis of unsteady processes in solid propellant combustion, particularly combustion stability and extinction by rapid depressurization. It is assumed that the solid decomposes at its surface by a pyrolysis law, and the gaseous decomposition products react exothermically following an Arrenius law. The nondimensional activation energy of the gas phase reaction is considered to be large so that the reaction takes place in a thin zone where the temperature is close to the flame temperature. The gas phase is assumed to be quasisteady and under this condition the equations in the gas phase are solved in the limit of high activation energies. The analysis of the energy equation in the condensed phase shows that the characteristic response time of the solid to gas phase perturbations is large compared to the characteristic residence time in the heat-up zone of the solid, their ratio being of the order the nondimensional activation energy in the gas phase reaction. A stability criterion has been obtained, resulting that for large values of the nondimensional activation energy of the pyrolysis law there is always unstable behaviour. For the stable case the dynamic extinction problem is being presently investigated. (Author).

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Research on Unsteady Combustion Processes

Research on Unsteady Combustion Processes

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Nonsteady propellant combustion and chamber flow behavior, particularly as they relate to combustion stability and aluminized propellant combustion are being st