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- W2328738552 abstract "Active open loop control of a swirl stabilized diffusion flame was experimentally studied. Control was achieved by simultaneously forcing the airstream and the fuel stream. The effects of forcing amplitude and the phase difference between the forcing signals were studied. All tests were performed using a small scale model of a swirl-stabilized spray combustor. The air jet was forced acoustically at amplitudes that corresponded to 30 % and 60 % of the mean velocity at the nozzle exit. Swirl was applied aerodynamically by injecting tangential air into the settling chamber. The swirl number was varied from 0 to 0.3. The phase angle between the air and liquid fuel pulsations was varied a full 360 degrees. Numerous combinations of amplitude, swirl and phase angles were tested. Injecting the fuel in phase with air pulsations resulted in the spray following the initial line of vortex formation. As the vortex grew, the fuel became entrained in the vortical structure resulting in effective mixing. Injecting the fuel out of phase with air pulsations led to the spray being injected into the vortex once it was fully developed. Measurements of forced flame temperature showed this condition to be least effective. Both increased swirl and liquid fuel pulsations resulted in increased heat release at the flame holder. Air forcing with and without swirl resulted in substantially increasing the heat release at the flame holder. It was shown that injecting fuel in phase with air pulsations resulted in maximum heat release." @default.
- W2328738552 created "2016-06-24" @default.
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- W2328738552 date "1998-01-12" @default.
- W2328738552 modified "2023-10-16" @default.
- W2328738552 title "Open loop control of a swirl-stabilized liquid fuel diffusion flame" @default.
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- W2328738552 doi "https://doi.org/10.2514/6.1998-351" @default.
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