Simulation of Turbulent Mixing Behind a Strut Injector in Supersonic Flow
The flowfield downstream of a strut-based injection system in a supersonic combustion ramjet is investigated using large-eddy simulation with a new localized dynamic subgrid closure for compressible turbulent mixing. Recirculations are formed at the base of the strut in the nonreacting flow and trap...
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Published in | AIAA Journal Vol. 48; no. 3; pp. 526 - 539 |
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Main Authors | , |
Format | Journal Article |
Language | English Japanese |
Published |
Virginia
American Institute of Aeronautics and Astronautics (AIAA)
01.03.2010
American Institute of Aeronautics and Astronautics |
Subjects | |
Online Access | Get more information |
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Summary: | The flowfield downstream of a strut-based injection system in a supersonic combustion ramjet is investigated using large-eddy simulation with a new localized dynamic subgrid closure for compressible turbulent mixing. Recirculations are formed at the base of the strut in the nonreacting flow and trap some of the injected fluid. The high levels of turbulence along the underexpanded hydrogen jets and in the shear layer lead to a high level of mixing of fuel and freestream fluids. Furthermore, the shear layer unsteadiness permits efficient large-scale mixing of freestream and injected fluids. In the reacting flowfield, the flame anchoring mechanism is, however, found to depend more on a recirculation region located downstream of the injectors than on their sides. A region of reverse flow is formed that traps hot products and radicals. Intermittent convection of hot fluid toward the injector occurs and preheats the reactants. [PUBLICATION ABSTRACT] |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0001-1452 1533-385X |
DOI: | 10.2514/1.43647 |