Radiative heat transfer analysis with molten Al2O3 dispersion in solid rocket motors

Jy Yun Jung, M. Q. Brewster

Research output: Contribution to journalArticle

Abstract

Radiative heat transfer by alumina smoke particles (molten Al 2O3) in aluminized solid rocket motor internal flowflelds has been investigated by computational simulation. The issue of how to define the alumina dispersion's radiative properties has been addressed to be compatible with existing radiative transfer equation solvers. Individual particle radiative properties, which are nongray and anisotropicin scattering, are evaluated from fundamental particle scattering theory for spheres (i.e., Mie theory) and optical constants from the literature, including temperature and spectral dependence. An integration procedure over wavelength has been implemented to make use of the effective gray form of two common radiative transfer equation solvers: the finite volume method and Rosseland diffusion radiation model. The internal flowfield has been modeled including turbulent multiphase flow with inert radiating particles using commercial computational fluid dynamics software. The simulation has been exercised for a subscale solid rocket motor, the75-lbballistic test and evaluation systems motor. Simulation results show that the bulk of the internal flowfield (the core flow) is very optically thick, so much so as to be amenable to Rosseland diffusion modeling.

Original languageEnglish (US)
Pages (from-to)1021-1030
Number of pages10
JournalJournal of Spacecraft and Rockets
Volume45
Issue number5
DOIs
StatePublished - 2008

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

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