Results 71 to 80 of about 135 (129)
Some of the next articles are maybe not open access.
A hollow combustor that intensifies rotating detonation
Aerospace Science and Technology, 2019Abstract Annular combustors are traditional, while hollow combustors without centerbodies are becoming popular for rotating detonation engines. Both schemes are studied experimentally in this paper to determine which combustor demonstrates a better detonation performance and pressure gain performance.
Yuhui Wang, Jialing Le
exaly +2 more sources
Characterization of instabilities in a Rotating Detonation Combustor
International Journal of Hydrogen Energy, 2015Abstract 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.
Ephraim Gutmark +2 more
exaly +2 more sources
Hollow Rotating Detonation Combustor
54th AIAA Aerospace Sciences Meeting, 2016A 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 +2 more
openaire +1 more source
Longitudinal pulsed detonation instability in a rotating detonation combustor
Experimental Thermal and Fluid Science, 2016Abstract The peculiar phenomenon of longitudinal pulsed detonation (LPD) in a rotating detonation combustor (RDC) is studied using hydrogen–air mixtures, by utilizing: (i) two air injection schemes having different inlet areas, and (ii) a convergent nozzle assembly with different spacers that affixes to the RDC exit.
Vijay Anand +3 more
openaire +1 more source
Rotating Detonations in Hollow and Flow-Through Combustors
AIAA Journal, 2023This paper focuses on rotating detonation combustor (RDC) experiments involving two configurations, a hollow and flow-through RDC, using hydrogen–air and ethylene–air mixtures. Two air injection areas with gaps of 1.778 and 3.81 mm were used at different air mass flow rates of 0.2, 0.3, 0.4, and 0.5 kg/s and equivalence ratios from 0.6 to 2 in 0.2 ...
Rachel Wiggins +6 more
openaire +1 more source
Secondary waves dynamics and their impact on detonation structure in rotating detonation combustors
Shock Waves, 2021In this work, we experimentally investigate secondary waves in rotating detonation combustor (RDC) operation. Secondary waves are finite-strength periodic perturbations of the field, which manifest as reacting fronts and/or pressure rise rotating around the annulus superimposed to one or more detonation waves.
F. Chacon, A. D. Feleo, M. Gamba
openaire +1 more source
Starting Transients and Detonation Onset Behavior in a Rotating Detonation Combustor
54th AIAA Aerospace Sciences Meeting, 2016The 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 +3 more
openaire +1 more source
One-Dimensional Analysis of the Magnetohydrodynamic Effect in Rotating Detonation Combustors
AIAA Journal, 2016In rotating detonation combustors, the high operational frequency and temperature level (2000–4000 K) offer the potential of direct power extraction through the magnetohydrodynamic effect. In this paper, first of all, electrical conductivity and chemical properties are evaluated with an in-house-built chemical kinetics library: Mutation++.
Braun, James +3 more
openaire +3 more sources
Observations of DC shift and chugging in a pressurized rotating detonation combustor
Acta Astronautica, 2021Abstract Rotating detonation combustors are prone to a wide range of off-design behaviors during both atmospheric and pressurized operation. The current manuscript deals with the transient mean pressure change seen in back-pressurized combustors after ignition. Using experimental high-speed pressure data acquired during this transience, we report two
Vijay Anand, Libin Babu, Ephraim Gutmark
openaire +1 more source
Rotating Detonation Combustor Research at the University of Cincinnati
Flow, Turbulence and Combustion, 2018Rotating 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