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Numerical analysis of transient combustion response to acoustic oscillations in axisymmetric rocket motors

Roh, T. S. and Culick, F. E. C. (1998) Numerical analysis of transient combustion response to acoustic oscillations in axisymmetric rocket motors. AIAA Papers, 98-0253. American Institute of Aeronautics and Astronautics . http://resolver.caltech.edu/CaltechAUTHORS:20101118-141630231

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Abstract

A numerical analysis of unsteady motions in solid rocket motors with a nozzle has been conducted. The formulation treats the complete conservation equations for the gas phase and the one-dimensional equations in the radial direction for the condensed phase. A fully coupled implicit scheme based on a dual time-stepping integration algorithm has been adopted to solve the governing equations and associated boundary conditions. After obtaining a steady state solution, periodic pressure oscillations are imposed at the head end to simulate acoustic oscillations of a traveling-wave motion in the combustion chamber. The amplitude of the pressure oscillation is 1.0 % of the mean pressure and the frequency is 1790 Hz, corresponding to the twice of the fundamental frequency of the chamber. Magnitude and phase of pressure and axial velocity fluctuations are influenced by the upstream reflecting wave from the nozzle wall. Axial velocity near surface region oscillates in phase advance manner with reference to the acoustic pressure. Large vorticity fluctuations are observed in near surface region. The mass-flow-rate at the nozzle exit periodically oscillates with a time delay compared to the imposed pressure oscillations at the head end.


Item Type:Report or Paper (Technical Report)
Additional Information:© 1998 the authors.
Group:Guggenheim Jet Propulsion Center
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Guggenheim Jet Propulsion Center395
AIAA98-0253
Record Number:CaltechAUTHORS:20101118-141630231
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20101118-141630231
Official Citation:Numerical analysis of transient combustion response to acoustic oscillations in axisymmetric rocket motors Roh, Tae-Seong, California Inst. of Technology, Pasadena; Culick, E. C., California Inst. of Technology, Pasadena AIAA-1998-253
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:20904
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:29 Nov 2010 19:07
Last Modified:26 Dec 2012 12:39

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