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• W2327207854 abstract "The pressure gain of rotating detonation engines has great potential to increase efficiency of cycles involving combustion. The RDE’s advantages over current pulsed detonation cycles include needing only a single initiation, having a more uniform exhaust pressure, compact design, and capability to process high flow rates. With very few exceptions, premixed operation of an RDE has proven difficult, with the flame igniting the supply upstream of the RDE. As a consequence, much energy has been put toward the design of a mixing system that occurs near or at the inlet of the RDE. Designs utilizing many thin two dimensional (2D) slots have shown some promise, however ignition of the incoming flow due to dead zones behind the plates has occurred. This may be the cause for reversals as seen in simulations by Schwer and Kailasanath, which also may be a mode for blow-off. The future of the technology requires an understanding of how inlet geometry affects pressure loss and detonation stability. The current study looks at the need to investigate the current designs of three dimensional RDE injection and mixing and to investigate the effects of geometry modification on the propensity to flame-hold rather than detonate and lift-off, and help aid the effort to ensure fewer hot dead zones in the post-detonation refill, which lead to instability. A numerical study using a Reynolds-Averaged Navier-Stokes (RANS) Computational Fluid Dynamics (CFD) program Fluent, by ANSYS is being performed to test three dimensional (3D) configurations of RDE fuel injection and mixing. The effect of various 3D geometries will be studied, including a previously published design made by the AFRL, currently in operation at the University of Cincinnati. A simple Spalart-Allmaras turbulence model will be used to simulate mixing of hydrogen and air. Detonation of through the designs will test for flame-holding, and investigate the effect of wall thermodynamics." @default.
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• W2327207854 date "2014-07-25" @default.
• W2327207854 modified "2023-09-27" @default.
• W2327207854 title "Computational Analysis of Existing and Altered Rotating Detonation Engine Inlet Designs" @default.
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• W2327207854 doi "https://doi.org/10.2514/6.2014-3668" @default.
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