Hydrodynamic stability of solid and liquid propellant combustion

John Bechtold, Stephen B. Margolis

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We derive a model which describes the dynamics of a multiphase system consisting of a gas flame attached to a pyrolyzing solid or liquid propellant. We consider the case in which the multiphase flame, which includes the propellant interface, the preheat zone and the gas-phase reaction zone, is thin compared to some characteristic hydrodynamic length. An asymptotic analysis of the inner structure then yields jump conditions on the fluid and transport variables across the multiphase flame, which is treated as a surface of discontinuity separating the unburned condensed-phase propellant from the burned gas. The resulting model, which describes the evolution of this surface, is then used to investigate the hydrodynamic (Landau) stability of propellant deflagration. In particular, it is shown that this type of instability is completely suppressed for solid propellants, whereas for liquid propellants, a cellular instability arises which is similar to that which occurs in premixed flame propagation.

Original languageEnglish (US)
Pages (from-to)49-84
Number of pages36
JournalCombustion science and technology
Volume68
Issue number1-3
DOIs
StatePublished - Nov 1 1989

Fingerprint

propellant combustion
Liquid propellants
solid propellants
flow stability
Solid propellants
propellants
Propellants
Hydrodynamics
Gases
liquids
flames
Asymptotic analysis
hydrodynamics
deflagration
premixed flames
flame propagation
Fluids
gases
discontinuity
vapor phases

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)
  • Chemical Engineering(all)
  • Chemistry(all)
  • Fuel Technology

Cite this

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Hydrodynamic stability of solid and liquid propellant combustion. / Bechtold, John; Margolis, Stephen B.

In: Combustion science and technology, Vol. 68, No. 1-3, 01.11.1989, p. 49-84.

Research output: Contribution to journalArticle

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