Results 131 to 140 of about 1,472 (179)

Characterization of instabilities in a Rotating Detonation Combustor

International Journal of Hydrogen Energy, 2015
Abstract Rotating Detonation Combustor (RDC) operation is investigated under different air and fuel flow rates, and varied geometries to reveal four fundamentally different instabilities. Select test points are chosen to study these instabilities using qualitative and quantitative tools.
Vijay Anand, Andrew St. George, Robert Driscoll, Ephraim Gutmark   +3 more
openaire   +1 more source

Rotating Detonation Combustor Downstream Transition Passage Design Considerations

2021
A key enabler to integrate turbines downstream of rotating detonation combustors is the design of an optimal combustor-turbine passage. Precise estimates of fluctuations, losses, and heat loads are required for the turbine design as rotating detonation combustors feature transonic flow with rotating shocks moving at few kilohertz.
James Braun, Guillermo Paniagua, Donald Ferguson   +2 more
openaire   +1 more source

Experimental study of a hydrogen-air rotating detonation combustor

International Journal of Hydrogen Energy, 2017
Abstract The rotating detonation engine can generate continuous thrust via one or more detonation waves. In this study, rotating detonation experiments were performed on a combined structure which included a rotating detonation combustor (RDC) and a centrifugal compressor. Air, which functioned as an oxidiser, was obtained from the environment by the
Shengbing Zhou, Hu Ma, Daokun Liu, Yu Yan, Shuai Li, Changsheng Zhou   +5 more
openaire   +1 more source

T63 Turbine Response to Rotating Detonation Combustor Exhaust Flow

Volume 3: Coal, Biomass, and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems, 2018
This paper describes testing an axial turbine response when driven by a Rotating Detonation Combustor (RDC). A T63 (C20-250) gas turbine is modified by replacing the combustor with a RDC. The stator vanes of the T63 are heavily instrumented for measurement of flow enthalpy and pressure.
Andrew Naples, John Hoke, Ryan Battelle, Fred Schauer   +3 more
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

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

Reduced-Fidelity Detonation Model Using Multistate Approximation for Rotating Detonation Combustors

Volume 3A: Combustion, Fuels & Emissions
Abstract Rotating detonation engines (RDEs) provide a practical approach to pressure-gain combustion. Recent studies have shown that the interaction between the wave and flow path components such as turbines, compressors, inlets, and nozzles are critical for understanding the realizable efficiency.
Yusuf Keskinoz, Oliver Gibson, Venkatramanan Raman   +2 more
openaire   +1 more source

Rotating Detonation Combustor Research at the University of Cincinnati

Flow, Turbulence and Combustion, 2018
Rotating detonation combustors (RDC) are at the forefront of pressure gain combustion (PGC) research. The simplicity in design and the ease of assembly makes it a promising technology that could be integrated into existing combustor architectures. This is, however, coupled with the considerable complexities of the detonation-based flow field, and the ...
Vijay Anand, Ephraim Gutmark
openaire   +1 more source

Statistical Treatment of Wave Instability in Rotating Detonation Combustors

53rd AIAA Aerospace Sciences Meeting, 2015
Rotating Detonation Combustor operation is found to ensconce an inherent low frequency pulsation in addition to the dominant frequency of rotation of the Continuous Spin Detonation (CSD) waves. This low frequency oscillation of the CSD waves in a Rotating Detonation Combustor is studied by extracting the frequency, the number of detonation waves ...
Vijay Anand, Andrew C. St. George, Robert B. Driscoll, Ephraim J. Gutmark   +3 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