Results 111 to 120 of about 419 (166)
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INVESTIGATION OF ROTATING DETONATION PHYSICS AND DESIGN OF A MIXER FOR A ROTATING DETONATION ENGINE
2023A fast model of a Rotating Detonation Combustor (RDC) is developed based on the Method of Characteristics (MOC). The model provides a CFD-like solution of an unwrapped 2D RDC flow field in under 10 seconds with similar fidelity as 2D Reacting URANS simulations.
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Rotating Detonations and Spinning Detonations: Similarities and Differences
AIAA Journal, 2018Rotating Detonation Combustors are studied with increasing interest worldwide, and are seen as the most promising of the available pressure gain (stagnation) combustion concepts.
Vijay Anand, Ephraim Gutmark
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Instabilities of Rotating Detonation
2019In order to investigate the combustion phenomena of rotating detonation of H2/air, ground experiments under different airflow rates at equivalence ratio of 1.0 are operated in an annular rotating detonation combustor (RDC), which uses the non-premixed mixture injection scheme. The airflow rates vary from 75 to 225 g/s.
Haocheng Wen, Qiaofeng Xie, Bing Wang
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Rotating Detonation Wave in an Annular Gap
Proceedings of the Steklov Institute of Mathematics, 2018The authors consider the three-dimensional Euler equations of an ideal multicomponent reacting mixture that describe combustion of an air-fuel mixture in an annular gap. The system is studied numerically, using high-performance computers. Air is considered as an oxygen-nitrogen mixture, the fuel is gaseous.
Levin, V. A. +2 more
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ON THE MECHANISM FOR MAINTAINING AN OVERDRIVEN DETONATION IN A ROTATING DETONATION ENGINE
NONEQUILIBRIUM PROCESSES. Vol. 2. Fundamentals of combustion, 2020At present, virtually all jet engines are based on the Brighton thermodynamic cycle (combustion at constant pressure). The improvement of such engines has already reached its technological limit. A significant increase in the efficiency of jet engines (by 20%-25%) can be provided by a transition to the Fickett-Jacobs[4] thermodynamic cycle which uses ...
P. V. Bulat +2 more
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Longitudinal pulsed detonation instability in a rotating detonation combustor
Experimental Thermal and Fluid Science, 2016Abstract The peculiar phenomenon of longitudinal pulsed detonation (LPD) in a rotating detonation combustor (RDC) is studied using hydrogen–air mixtures, by utilizing: (i) two air injection schemes having different inlet areas, and (ii) a convergent nozzle assembly with different spacers that affixes to the RDC exit.
Vijay Anand +3 more
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Supersonic driven detonation dynamics for rotating detonation engines
International Journal of Hydrogen Energy, 2019Abstract In this paper we present the first exploration of detonation wave propagation dynamics in premixed supersonic flows using a novel rotating detonation engine (RDE) configuration. An RDE with a coupled linear extension, referred to as ρDE, is used to divide detonations traveling radially in the RDE into linearly propagating waves. A tangential
Jonathan Sosa +5 more
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Turbulent Detonation Transition in a Linearized Rotating Detonation Engine
2018 AIAA Aerospace Sciences Meeting, 2018An experimental investigation to characterize flame and detonation propagation dynamics within a Rotating Detonation Engine (RDE) using a hydrogen air mixture is conducted. Using a transition that directs flow from an RDE to a linear channel, the fast propagating flame of interest can be easily observed and probed.
Chambers, Jessica M. +4 more
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Multiphase Rotating Detonation Engine
Volume 4A: Combustion, Fuels, and Emissions, 2020Abstract The first experimental evidence of a solid-gas multiphase rotating detonation engine. Coal particles, carbon black with a volatility of 1% and a carbon concentration of 99%, were detonated successfully over many operational parameters.
Ian Dunn, Kareem Ahmed
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Investigations on rotating detonation engines
AIP Conference Proceedings, 2020In this paper we would discuss the possible other methods of propulsion system i.e. detonation wave engines. After some extensive research and experiments in the initial proceedings of the combustion system the researchers have concluded that there is a significant rise in the pressure which in turn increases the overall efficiency in comparison to ...
Lakshmi Sumedha Appalla +2 more
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