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- W2321395024 abstract "Abstract : Combustion instability in rocket chambers is strongly influenced by acoustic interactions at the boundaries of the configuration. Many CFD simulations employ approximate boundary conditions in order to simplify the geometry but the impact that they have on the solution is not well understood. The present study focuses on the use of detailed (exact) boundary representations and an approximate boundary condition in a given longitudinal mode test chamber. The actual inlet boundary of the injector is comprised of a series of choked slots while the approximate boundary condition is a uniform constant mass flow. Both two and three-dimensional simulations are carried out. Differences in the flowfield are evident in the combustion region away from the inlet, including the size of the recirculation region and location of the peak heat release. The amplitudes of the acoustic modes are well predicted for the first two modes especially in three-dimensional simulation, while higher modes are poorly predicted. These results suggest that such boundary condition approximations must be judiciously used and having access to more detailed treatments is important to verify accuracy." @default.
- W2321395024 created "2016-06-24" @default.
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- W2321395024 date "2013-07-12" @default.
- W2321395024 modified "2023-09-27" @default.
- W2321395024 title "Influence of Boundary Condition Treatment on Longitudinal Mode Combustion Instability Predictions" @default.
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- W2321395024 doi "https://doi.org/10.2514/6.2013-3994" @default.
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