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- W2100542374 abstract "** † ‡ Experimental data from an unstable model rocket combustor are analyzed using a linear one-dimensional acoustic model. The focus is on determining the influence of the oxidizer tube of the swirl-coaxial injector element on the acoustics and stability of the system at varying chamber lengths. The most significant effects of the oxidizer tube are seen in the system resonance frequencies and amplitude of acoustic pressure oscillations in the combustion chamber. Resonance frequencies are shown to be non-integer multiples, unlike traditional longitudinal modes, at certain combustion chamber lengths and are verified by comparisons with experimental data. In addition, certain modes calculated by the acoustic model to be highly damped in the combustion chamber are found to be unstable during the experiment, thereby indicating that the unsteady combustion process is dominating the stability response. Further, comparisons of the acoustic model with detailed CFD analysis verify the mode shape predictions and indicate the additional influence of mean flow Mach number and nonlinear effects on the mode shapes and frequencies." @default.
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- W2100542374 date "2006-07-09" @default.
- W2100542374 modified "2023-09-24" @default.
- W2100542374 title "Examination of Mode Shapes in an Unstable Model Rocket Combustor" @default.
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- W2100542374 doi "https://doi.org/10.2514/6.2006-4525" @default.
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