Results 121 to 130 of about 419 (166)

Formation of detonation in rotating channels

Doklady Physics, 2010
308 For estimating the possibility of detonation initia tion during rotation, we considered the gasmixture flow inside and outside the rotating elliptic cylinder included in the circular cylinder. The values of critical parameters at which the detonation is formed were determined.
V. A. Levin, I. S. Manuĭlovich, V. V. Markov   +2 more
openaire   +1 more source

Rotating Detonation Engine Operation

50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2012
A 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, Sheng-Tao Yu, John Hoke, Andrew Naples, Frederick Schauer, Rachel Russo   +5 more
openaire   +1 more source

On the existence and multiplicity of rotating detonations

Proceedings of the Combustion Institute, 2017
Abstract The operating behavior of a rotating detonation combustor is experimentally explored for stoichiometric H 2 –O 2 –N 2 mixtures for four combustor geometries to determine the role of cell width ( λ ) and combustor channel width ( w ch ) on the existence of detonation and number of waves. The ratio of nitrogen dilution ratio ( β  = N 2 :O 2 )
A. St. George, R. Driscoll, V. Anand, E. Gutmark   +3 more
openaire   +1 more source

Fundamental Study of Detonation Structure in Rotating Detonation Engine

2020
The maturation of Brayton-cycle engines has led to a plateau in combustor performance where improvements between successive generations are slight. Detonation-based heat addition, in place of deflagrations, may offer an opportunity to radically improve the performance of both air-breathing and rocket systems.
openaire   +2 more sources

Hollow Rotating Detonation Combustor

54th AIAA Aerospace Sciences Meeting, 2016
A continuous, azimuthally rotating, detonation wave propagating between the confines of a narrow annulus has been the essence of the Rotating Detonation Combustor (RDC) mechanics, till date. This research, however, focuses on the incipient RDC concept that utilizes a hollow combustor for the sustained rotating detonation, instead of the conventional ...
Vijay Anand, Andrew C. St. George, Ephraim J. Gutmark   +2 more
openaire   +1 more source

Starting Transients and Detonation Onset Behavior in a Rotating Detonation Combustor

54th AIAA Aerospace Sciences Meeting, 2016
The onset phase between combustor initiation and the appearance of a stable, periodic operating state is studied for four combustor conditions. The onset behavior and duration is assessed for varying air flow rate and equivalence ratio for cases with and without a converging nozzle at the combustor exit.
Andrew C. St. George, Robert B. Driscoll, Vijay Anand, Ephraim J. Gutmark   +3 more
openaire   +1 more source

Numerical investigation on detonation velocity in rotating detonation engine chamber

Proceedings of the Combustion Institute, 2017
Abstract 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, Yoshiki Kumazawa, Akiko Matsuo, Soma Nakagami, Ken Matsuoka, Jiro Kasahara   +5 more
openaire   +1 more source

Numerical Analysis of Threshold of Limit Detonation in Rotating Detonation Engine

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010
Rotating Detonation Engine (RDE) is a new kind of detonation engine, which may provide a high performance with a smaller and simpler system than the traditional ones. In order to optimize RDE system, the threshold of detonation limit must be studied for its best design and its best run.
Takayuki Yamada, Koich Hayashi, Nobuyuki Tsuboi, Eisuke Yamada, Venkat Tangirala, Toshi Fujiwara   +5 more
openaire   +1 more source

Spinning pulsed detonation in rotating detonation engine

Aerospace Science and Technology, 2022
Dawen Shen, John Z. Ma, Zhaohua Sheng, Guangyao Rong, Kevin Wu, Yunzhen Zhang, Jianping Wang   +6 more
openaire   +1 more source

Detonation Wave Dynamics in a Rotating Detonation Engine

AIAA Scitech 2019 Forum, 2019
Fabian Chacon, Mirko Gamba
openaire   +1 more source