Investigation of the Flame-Acoustic Wave Interaction during Axial Solid Rocket Instabilities

The major objectives of the program were (i) to determine the characteristics of solid propellant gas phase flames in rocket motors experiencing axial instabilities and (ii) to determine the validity of state of the art solid propellant response models. The program was divided into two tasks in orde...

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Bibliographic Details
Main Authors: Zinn, B T, Hegde, U G, Jagoda, J I, Daniel, B R
Format: Report
Language:English
Subjects:
ACOUSTIC WAVES
ACOUSTICS
Combustion and Ignition
COMBUSTION STABILITY
DAMPING
DIFFUSION
FLAMES
MIXING
OSCILLATION
PE61102F
RESPONSE
ROCKET ENGINES
Solid Propellant Rocket Engines
SOLID PROPELLANTS
STABILIZATION
STANDING WAVES
THEORY
VALIDATION
WUAFOSR2308A1
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Summary:The major objectives of the program were (i) to determine the characteristics of solid propellant gas phase flames in rocket motors experiencing axial instabilities and (ii) to determine the validity of state of the art solid propellant response models. The program was divided into two tasks in order to achieve these objectives. In Task I, the response of sidewall stabilized premixed flames to longitudinal, standing acoustic waves (which simulate the oscillations encountered in unstable rocket motors) was studied. A premixed flame was chosen for this first phase as it eliminated the need to deal with difficulties arising from the presence of diffusion processes in the flame (these were studied in Task II of the program) while providing a flame possessing many important features of actual solid propellant flames. A theoretical model of the unsteady behavior of such flames, based upon actual solid propellant response modes, was developed. Solid propellant rocket engines, Combustion instability, Premixed flames, Diffusion flames, Acoustic driving, Damping.