TY - GEN
T1 - Inlet buzz and combustion oscillation in an axisymmetric ramjet engine
AU - Yeom, Hyo Won
AU - Kim, Sung Jin
AU - Sung, Hong Gye
AU - Yang, Vigor
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - A unified numerical analysis was conducted to investigate the inlet buzz and combustion oscillation in an axisymmetric ramjet engine. The inlet buzz phenomenon in the subcritical operation arises large pressure oscillation, combustion instability, engine surge, and thrust loss, etc. The physical model of concern includes the entire engine flow path, extending from the leading edge of the inlet center-body through the exhaust nozzle. The theoretical formulation is based on the Farve-averaged conservation equations of mass, momentum, energy, and species concentration, and accommodates finite-rate chemical kinetics and variable thermo-physical properties. Turbulence closure is achieved using the combined model of a low-Reynolds number k-ε two-equation model and Sarkar's compressible turbulence model. The detail flow structures such as buzz shock train, shock/boundary layer interaction, and flame fluctuation are observed. Both the driving source to the inlet buzz and buzz effects on both flow and flame evolutions are studied.
AB - A unified numerical analysis was conducted to investigate the inlet buzz and combustion oscillation in an axisymmetric ramjet engine. The inlet buzz phenomenon in the subcritical operation arises large pressure oscillation, combustion instability, engine surge, and thrust loss, etc. The physical model of concern includes the entire engine flow path, extending from the leading edge of the inlet center-body through the exhaust nozzle. The theoretical formulation is based on the Farve-averaged conservation equations of mass, momentum, energy, and species concentration, and accommodates finite-rate chemical kinetics and variable thermo-physical properties. Turbulence closure is achieved using the combined model of a low-Reynolds number k-ε two-equation model and Sarkar's compressible turbulence model. The detail flow structures such as buzz shock train, shock/boundary layer interaction, and flame fluctuation are observed. Both the driving source to the inlet buzz and buzz effects on both flow and flame evolutions are studied.
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M3 - Conference contribution
AN - SCOPUS:78649865543
SN - 9781600867392
T3 - 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
BT - 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
T2 - 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
Y2 - 4 January 2010 through 7 January 2010
ER -