Results 191 to 200 of about 259 (237)

Turbulent Detonation Transition in a Linearized Rotating Detonation Engine

2018 AIAA Aerospace Sciences Meeting, 2018
An 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., Ahmed, Kareem A., Stevens, Christopher A., Hoke, John, Schauer, Frederick R.   +4 more
openaire   +2 more sources

Energy Transfer in a Rotating Detonation Engine

47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2011
Rotating Detonation Engines (RDE's) have the potential to achieve the high propulsive efficiencies of detonation cycles in a simple and effective annular geometry. A thorough understanding of the thermodynamic cycle is required to achieve this potential.
Craig Nordeen, Douglas Schwer, Fred Schauer, John Hoke, Thomas Barber, Baki Cetegen   +5 more
openaire   +1 more source

Numerical Investigation of Rotating Detonation Engines

46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2010
Rotating detonation engines (RDE’s) represent an alternative to the extensively studied pulse detonation engines (PDE’s) for obtaining propulsion from the high efficiency detonation cycle. Since it has received considerably less attention, the general flow-field and effect of parameters such as stagnation conditions, combustion chamber length, and fuel
Douglas Schwer, Kailas Kailasanath
openaire   +1 more source

Flowfield Characterization of a Rotating Detonation Engine

51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2013
A rotating detonation engine (RDE) at the Air Force Research Lab (AFRL) has been modified to allow optical access to the annulus while in operation. High speed video of chemiluminescence was taken for three operating conditions to characterize the RDE flowfield.
Andrew Naples, John Hoke, James Karnesky, Fred Schauer   +3 more
openaire   +1 more source

PRESSURE MEASUREMENTS IN ROTATING DETONATION ENGINES

Detonation: Latest accomplishments, 2020
The influence of waveguide tubes on the signals received by remote pressure sensors measuring pressure histories in pulsed detonation engines (PDE) and rotating detonation engines (RDE) is studied computationally. Two types of pressure sensors are considered: low-frequency static pressure sensors and high-frequency sensors of pressure pulsations. Three
V. S. IVANOV, S. S. SERGEEV, S. M. FROLOV, YU. M. MIRONOV, A. E. NOVIKOV, I. I. SCHULZ   +5 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

Thermodynamic model of a rotating detonation engine

Combustion, Explosion, and Shock Waves, 2014
The conventional Zel’dovich-von Neumann-Doring (ZND) detonation theory is modified with two-dimensional velocity vectors to account for the performance and steady-state flow features of a rotating detonation engine. The developed analytical model explains many of the steady-state features of the rotating detonation and its thermodynamics.
C. A. Nordeen, D. Schwer, F. Schauer, J. Hoke, Th. Barber, B. Cetegen   +5 more
openaire   +1 more source

Operability and Performance of Rotating Detonation Engines

2021
Rotating Detonation Engines (RDEs) provide a promising avenue for reducing greenhouse gas emissions from combustion-based propulsion and power systems by improving their thermodynamic efficiency through the application of pressure-gain combustion.
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

Buildup and Operation of a Rotating Detonation Engine

49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2011
A rotating detonation engine (RDE), originally designed and built by Pratt & Whitney – Seattle Aerosciences Center and on loan to the Air Force Research Laboratory (AFRL/RZTC) at Wright-Patterson Air Force Base (WPAFB), was rebuilt and tested.
Levi Thomas, Frederick Schauer, John Hoke, Andrew Naples   +3 more
openaire   +1 more source