Results 181 to 190 of about 259 (237)
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Numerical investigation on detonation velocity in rotating detonation engine chamber
Proceedings of the Combustion Institute, 2017Abstract A two-dimensional investigation is conducted to clarify the velocity decrease mechanism of a detonation wave propagating within a rotating detonation engine (RDE) chamber, focusing on the effect of injection conditions of the fuel and oxidizer.
Jumpei Fujii +2 more
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Numerical investigation of pre-detonator in rotating detonation engine
International Journal of Hydrogen Energy, 2021Abstract Pre-detonators are commonly used in rotating detonation engine (RDE) experiments. Current experimental studies focus on the performance of pre-detonator while ignoring the influence of pre-detonator on the flow field. In numerical simulations one-dimensional detonation wave is usually used to ignite the fresh gas in RDE.
Zhi-Jie Xia +3 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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Coexistence of detonation with deflagration in rotating detonation engines
International Journal of Hydrogen Energy, 2016Abstract Rotating detonation engines of high thermal efficiency and specific impulse have been studied a lot. However, rotating detonation waves lead to uneven flow field, local high temperature and high pressure, tending to damage the combustor.
Yuhui Wang, Jianping Wang
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Rotating Detonation Engine Operation
50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2012A Rotating Detonation Engine engineered and manufactured by Pratt and Whitney Seattle Aerosciences Center was loaned to the Air Force Research Laboratory at WrightPatterson Air Force Base for further testing and development. The engine was originally designed for ethylene and oxygen, but was altered in order to use hydrogen and air.
James Suchocki +5 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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Distribution of Enthalpy in Rotating Detonation Engine
Journal of Aerospace Sciences and Technologies, 2023In Rotating Detonation Engine (RDE), the detonation wave rotates inside the annulus of thecombustor. After initiation by a pre-detonator, this detonation wave can be sustained by thecontinuous supply of fuel and oxidiser. The frequency of rotation is reported to be of the orderof 5-10 KHz indicating a near continuous operation which can be used in ...
V. Ramanujachari, P Amrutha Preethi
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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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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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