Study of continuous detonation in an annular channel

Regimes of continuous detonation burning of synthesis gas-air mixtures in transverse (spinning) detonation waves are obtained for the first time in an annular cylindrical flow-type combustor. Carbon oxide-hydrogen mixtures with volume proportions of [CO]/[H 2 ] = 1/1, 1/2, and 1/3 are studied in a wide range of fuel-to-air equivalence ratios. The maximum detonation wave velocity equal to 1.57 km/s is observed for the mixture of CO + 3H 2 + air with a moderate (about 15%) excess of the fuel. The limits of existence of continuous detonation in terms of the equivalence ratio and the minimum specific flow rate of the mixture are determined. The range of detonation regimes obtained is constructed in the coordinates of the equivalence ratio-specific flow rate of the mixture.

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“…6). A similar pattern was observed for hydrogenair mixtures [4] and also for acetylene-oxygen mixtures in earlier studies [2,14].…”

Section: Analysis Of Experimental Resultssupporting

confidence: 89%

Continuous spin detonation of synthesis gas-air mixtures

Быковский

Ждан

Ведерников

2013

Combust Explos Shock Waves

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“…[20][21][22][23][24][25][26] This spinning detonation front was studied extensively by a group of Soviet/Russian investigators. 27,28 The feasibility of these waves for propulsive applications was apparently first studied by Voitsekhovskii and coworkers 29,30 at the Lavrent'ev Institute of Hydrodynamics (LIH), Novosibirsk, Russia. Additional early investigations were conducted by investigators at the University of Michigan.…”

Section: Introductionmentioning

confidence: 99%

Rotating Detonation Wave Propulsion: Experimental Challenges, Modeling, and Engine Concepts

Braun

Massa³

et al. 2014

Journal of Propulsion and Power

477

117

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Rotating detonation engines (RDEs), also known as continuous detonation engines, have gained much worldwide interest lately. Such engines have huge potential benefits arising from their simplicity of design and manufacture, lack of moving parts, high thermodynamic efficiency and high rate of energy conversion that may be even more superior than pulse detonation engines, themselves the subject of great interest. However, due to the novelty of the concept, substantial work remains to demonstrate feasibility and bring the RDE to reality. An assessment of the challenges, ranging from understanding basic physics through utilizing rotating detonations in aerospace platforms, is provided.

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“…The main advantages of RDE are its continuous operation and high combustion rate. Such rotating detonations have been experimentally observed by Voitsekhovskii [2] as early as 1959, and then Mikhailov [3] analyzed the structure of the detonation wave. In 1980s, Bykovskii's [4] experiments verified the possibility of controlling rotating detonation wave by using gaseous and liquid propellant fuel and injecting the fuel at subsonic speed in varying cross-section and constant sections of an annular combustor.…”

Section: Introductionmentioning

confidence: 98%

Numerical study on three-dimensional flow field of continuously rotating detonation in a toroidal chamber

et al. 2012

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Gaseous detonation propagating in a toroidal chamber was numerically studied for hydrogen/oxygen/nitrogen mixtures. The numerical method used is based on the three-dimensional Euler equations with detailed finiterate chemistry. The results show that the calculated streak picture is in qualitative agreement with the picture recorded by a high speed streak camera from published literature. The three-dimensional flow field induced by a continuously rotating detonation was visualized and distinctive features of the rotating detonations were clearly depicted. Owing to the unconfined character of detonation wavelet, a deficit of detonation parameters was observed. Due to the effects of wall geometries, the strength of the outside detonation front is stronger than that of the inside portion. The detonation thus propagates with a constant circular velocity. Numerical simulation also shows three-dimensional rotating detonation structures, which display specific feature of the detonationshock combined wave. Discrete burning gas pockets are formed due to instability of the discontinuity. It is believed that the present study could give an insight into the interesting properties of the continuously rotating detonation, and is thus beneficial to the design of continuous detonation propulsion systems.

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Study of continuous detonation in an annular channel

Cited by 10 publications

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Continuous spin detonation of synthesis gas-air mixtures

Continuous spin detonation of synthesis gas-air mixtures

Rotating Detonation Wave Propulsion: Experimental Challenges, Modeling, and Engine Concepts

Numerical study on three-dimensional flow field of continuously rotating detonation in a toroidal chamber

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