A comprehensive erosive-burning model for double-base propellants in strong turbulent shear flow
✍ Scribed by Xinping Wu; Mridul Kumar; Kenneth K. Kuo
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 880 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0010-2180
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✦ Synopsis
A comprehensive aerothermochemical model of erosive burning of double-base propellants has been developed. The present analysis includes detailed modeling of the combustion process, taking into account both chemical kinetics and diffusion effects in the gas phase. Different reactions simulating the fizz zone and the final flame zone (including dark and luminous zones) are considered in the gas phase. The instantaneous governing partial differential equations are Favre averaged to take into account variable density effects. The turbulence modeling consists of a two-equation (k-e) turbulence closure model for the final Favre-averaged conservation equations. The set of governing equations is solved numerically. Predicted results compare well with experimental data of Burick and Osborn for a noncatalytic double-base propellant. Predicted temperature profiles in the boundary layer correctly depict the characteristics of double-base propellant combustion. The main mechanisms for augmentation of the burning rate is the increase in heat feedback caused by turbulence-enhanced reactions and transport properties in the fizz zone.