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- W4387126855 abstract "Abstract A 15% increase in thermal efficiency at medium pressure ratios is promised by rotating detonation engine technology over conventional Joule-Bryton cycles. A supersonic inlet turbine is a viable option to extract substantial work from the highly fluctuating and supersonic flow delivered by the detonating combustor. However, an additional unstarting mechanism based on the generation of a collective shock from the coalescence of leading-edge bow-shock waves further restricts the available design space. Firstly, the effect of unsteady inlet conditions with variable frequency, amplitude, and mean value on collective shock generation is investigated. Then, a fast and cost-effective tool was developed and verified to predict bow shock wave motion from a prescribed inlet Mach trend; the parameters of the transfer function were estimated with a classical identification method based on a step-response CFD simulation. The model was employed to rapidly calculate the maximum amplitude of fluctuations accepted by the supersonic blade row for each frequency and average inlet Mach number. Finally, the influence of the inlet geometric angle, pitch to leading-edge thickness ratio, and static temperature on the model parameters is studied. The preliminary observations of the parametric analysis were confirmed by the rigorous quantitative approach of a global sensitivity analysis based on Sobol sensitivity indices." @default.
- W4387126855 created "2023-09-29" @default.
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- W4387126855 date "2023-06-26" @default.
- W4387126855 modified "2023-10-18" @default.
- W4387126855 title "The Effect of Upstream Unsteadiness on the Unstarting of a Supersonic Inlet Turbine" @default.
- W4387126855 doi "https://doi.org/10.1115/gt2023-103883" @default.
- W4387126855 hasPublicationYear "2023" @default.
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