Abstract:
Results of an experimental study of continuous and pulsed detonation of a hydrogen-air mixture in an annular flow-type combustor 306 mm in diameter with an expanding channel in the air ejection mode are reported. By varying the free-cross-sectional area of the slot for air supply, the number and cross-sectional area of the orifices of the fuel injectors, the size of the fuel receiver, and the initial pressure of the fuel, the domain of existence of detonation regimes in the coordinates “air ejection slot size versus the specific flow rate of hydrogen” is determined. An optimal air ejection slot width for the combustor and fuel used is found (10–12 mm); deviations from this slot width to either side reduce the domain of existence of detonation regimes. A necessity of making a step in the air supply path is found. It is also shows that there exists an optimal geometry of injector orifices, which expands the domain of existence of detonation regimes. Rough mixing of hydrogen with air, as well as too rapid mixing, makes the domain of detonation existence narrower. The following sequence of processes is found to occur as the hydrogen flow rate is increased: combustion transforms to longitudinal pulsed detonation, then to continuous spin detonation, then to pulsed detonation again, and finally to usual combustion. Experiments of long-time operation of the combustor without cooling are performed.
Keywords:
air ejection, hydrogen-air mixture, continuous spin detonation, pulsed detonation, flow-type combustor, flow structure, domain of existence.
Citation:
F. A. Bykovskii, S. A. Zhdan, E. F. Vedernikov, “Continuous detonation in the air ejection mode. Domain of existence”, Fizika Goreniya i Vzryva, 47:3 (2011), 92–97; Combustion, Explosion and Shock Waves, 47:3 (2011), 330–334
\Bibitem{BykZhdVed11}
\by F.~A.~Bykovskii, S.~A.~Zhdan, E.~F.~Vedernikov
\paper Continuous detonation in the air ejection mode. Domain of existence
\jour Fizika Goreniya i Vzryva
\yr 2011
\vol 47
\issue 3
\pages 92--97
\mathnet{http://mi.mathnet.ru/fgv1100}
\elib{https://elibrary.ru/item.asp?id=16910362}
\transl
\jour Combustion, Explosion and Shock Waves
\yr 2011
\vol 47
\issue 3
\pages 330--334
\crossref{https://doi.org/10.1134/S0010508211030105}
Linking options:
https://www.mathnet.ru/eng/fgv1100
https://www.mathnet.ru/eng/fgv/v47/i3/p92
This publication is cited in the following 5 articles:
Jian Sun, Jin Zhou, Shijie Liu, Zhiyong Lin, “Interaction between rotating detonation wave propagation and reactant mixing”, Acta Astronautica, 164 (2019), 197
Vijay Anand, Ephraim Gutmark, “Rotating detonation combustors and their similarities to rocket instabilities”, Progress in Energy and Combustion Science, 73 (2019), 182
F A Bykovskii, S A Zhdan, E F Vedernikov, A N Samsonov, E L Popov, “Detonation of a hydrogen-oxygen gas mixture in a plane-radial combustor with exhaustion toward the periphery in the regime of oxygen ejection”, J. Phys.: Conf. Ser., 1128 (2018), 012075
Chao Wang, Weidong Liu, Shijie Liu, Luxin Jiang, Zhiyong Lin, “Experimental investigation on detonation combustion patterns of hydrogen/vitiated air within annular combustor”, Experimental Thermal and Fluid Science, 66 (2015), 269
Xin-Meng Tang, Jian-Ping Wang, Ye-Tao Shao, “Three-dimensional numerical investigations of the rotating detonation engine with a hollow combustor”, Combustion and Flame, 162:4 (2015), 997
Citation in format AMSBIB
Contact us: