Results 81 to 90 of about 135 (129)

Characterization of initiator dynamics in a rotating detonation combustor

Experimental Thermal and Fluid Science, 2016
Abstract The performance of a tangentially-injecting initiator tube of a rotating detonation combustor (RDC) is assessed for a range of initiator conditions. Two initiator fuels are evaluated for a range of RDC channel pressures, and channel widths to determine the effect on the blast wave generated by the initiator tube.
A. St. George, S. Randall, V. Anand, R. Driscoll, E. Gutmark   +4 more
openaire   +1 more source

Secondary shock wave in rotating detonation combustor

Aerospace Science and Technology, 2019
Abstract The secondary shock wave in rotating detonation combustor is studied by the combination of numerical simulation and experiments. Based on the pseudo-nozzle flow in the post-detonation zone, the influencing factors which cause the existence of secondary shock wave are clarified and then verified by experiments.
Li Deng, Hu Ma, Xiao Liu, Changsheng Zhou   +3 more
openaire   +1 more source

Rotating detonation combustors and their similarities to rocket instabilities

Progress in Energy and Combustion Science, 2019
Abstract Rotating detonation combustors (RDC) are at the forefront of pressure gain combustion (PGC) research, utilizing one or more azimuthally spinning detonation waves, an intrinsically unsteady process, to effect a stagnation pressure rise across the device. The prospective step-increase in efficiency, simplicity of design without the requirement
Vijay Anand, Ephraim Gutmark
openaire   +1 more source

Propagation behaviors of rotating detonation in an obround combustor

Combustion and Flame, 2019
Abstract In the study, the propagation behaviors of rotating detonation are investigated in an obround slit-channel combustor which has four curvature transition sections by employing a H2 O2 N2 mixture with different oxygen volume fractions (α) and equivalence ratios (ERs). High-frequency pressure sensors are circumferentially mounted into the outer
Haocheng Wen, Qiaofeng Xie, Bing Wang
openaire   +1 more source

Operating mode dynamics in rotating detonation combustors

2020
Pressure gain combustion (PGC) is considered to be the key technology to unlock the potential for significant efficiency increase in technical combustion systems. At the current level of development, Rotating Detonation Combustors (RDCs) represent one of the most promising concepts for the realization of PGC in practical systems.
openaire   +1 more source

Experimental study of perforated-wall rotating detonation combustors

Combustion and Flame, 2020
Abstract Perforated walls are potentially applied in rotating detonation combustors (RDCs) to stabilize combustion and perform transpiration cooling. This study involves an experimental investigation on the rotating detonation in perforated-wall combustors for the first time.
Haocheng Wen, Bing Wang
openaire   +1 more source

AN OASIS OF PURE AEROTHERMAL DILEMMAS: INTEGRATING TURBINES WITH ROTATING DETONATION COMBUSTORS

PROGRESS IN DETONATION RESEARCH, 2019
Small Brayton/Joule engines, operating at low pressure ratios, with relatively large gap clearances exhibit poor efficiency. Instead, the development of a small rotating detonation engine holds great promise to offer mankind a sustainable solution for off-grid power generation as well as distributed systems.
G. PANIAGUA, J. BRAUN, T. MEYER, V ATHMANATHAN, S. ROY   +4 more
openaire   +1 more source

Non-uniform injection in a rotating detonation combustor

Physics of Fluids
Due to the complex operating conditions and the high-temperature, high-pressure environment, the rotating detonation combustor (RDC) used in propulsion systems may experience partial failures of the fuel injectors, which in turn can degrade the RDC's operational stability.
Yitao Kou, Shanguang Guo, Yun Wu, Zhao Yang, Pengfei Feng, Zhangyi Meng, Yibing Chang   +6 more
openaire   +1 more source

Mixed-Fidelity Model of Rotating Detonation Combustor

The rotating detonation combustor (RDC) is a type of pressure gain combustor (PGC) with potential for improved thermodynamic efficiency and geometric simplicity, facilitating easy integration into existing power systems and propulsion systems. The difficulty in controlling RDC lies in the chaotic and unpredictable nonlinear dynamics of detonation waves.
openaire   +1 more source

Experimental and Computational Analysis of a Rotating Detonation Combustor

AIAA SCITECH 2022 Forum, 2022
Jonathan Tobias, Ajay K. Agrawal, Daniel E. Paxson   +2 more
openaire   +1 more source