Hydrogen detonation and fast deflagration triggered by a turbulent jet of combustion products

Medvedev, S. P.; Khomik, S. V.; Olivier, H.; Polenov, A. N.; Bartenev, A. M.; Gel’fand, B. E.

doi:10.1007/s00193-005-0264-7

Cited by 33 publications

(15 citation statements)

References 12 publications

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“…On the other hand, the ignition and subsequent combustion of the mixture take place even at lower Mach number values. As was mentioned in [3][4][5], the velocity of the precursor shock is about 0.5 D CJ . Thus, it is realistic to deduce that the reactive mixture can be ignited and react during the 3D focusing of shock waves.…”

Section: Resultsmentioning

confidence: 69%

“…The phenomenon of detonation re-initiation behind a partition with several holes, e.g. perforated plate, is also identified as jet initiation of detonation or detonation initiation via 1D turbulent interface [2][3][4][5]. In the latter case the detonation fails due to the reflection from the partition, and then, it can or cannot be re-initiated.…”

Section: Introductionmentioning

confidence: 99%

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Limits and mechanism of detonation re-initiation behind a multi-orifice plate

et al. 2012

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An experimental investigation was performed to establish the dependence of concentration limits of detonation re-initiation behind a multi-orifice plate on mixture composition and initial pressure for hydrogen-air mixtures. The experiments were carried out in detonation tubes of diameter 106 and 141 mm, separated by a multi-orifice plate into two sections. The tubes were equipped with pressure gauges and a semi-cylindrical smoked plate. It is shown that initial pressure has strong influence on the value of concentration limit, especially for lean hydrogen-air mixtures. On the basis of soot records it can be inferred that re-initiation occurs due to two different mechanisms that depend on the mixture sensitivity and properties of the multi-orifice plate.Communicated by S. Dorofeev.

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Section: Resultsmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Limits and mechanism of detonation re-initiation behind a multi-orifice plate

et al. 2012

Self Cite

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“…Except for direct initiation [6][7][8][9] which can realize initiation immediately but need large energy, an alternative is to use a hot jet that can also realize quick initiation [10] . Researches on detonation initiation with a hot jet have been numerously investigated [11][12][13][14][15][16] , but most of them are carried out only in quiescent combustible mixtures. Detonation initiation and propagation using a hot jet were conducted experimentally by Ishii et al [17] , where the Mach numbers of combustible mixtures were 0.9 and 1.2.…”

Section: Introductionmentioning

confidence: 99%

Adaptive mesh refinement based simulations of three-dimensional detonation combustion in supersonic combustible mixtures with a detailed reaction model

Cai

Liang

Deiterding

et al. 2016

International Journal of Hydrogen Energy

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Although the overdrive degree of the 3D detonation is smaller than that of the 2D case, more complex and irregular detonation fronts can be observed in the 3D case compared with the 2D detonation, which is likely because of the propagation of transverse waves and collisions of triple lines in multi-directions in 3D detonations. After the hot jet is shut down, the newly formed 2D Chapman-Jouguet (CJ) detonation has almost the same characteristic parameters with the corresponding 3D case, indicating that the 2D instabilities can be perfectly preserved in 3D simulations. However, the slapping wave reflections on the side walls in the 3D detonation result in the second oscillation along with the main one, which presents stronger instabilities compared with the 2D case. The inherent stronger 3D instabilities is also verified through the quantitative comparison between the 2D and 3D cases where the 3D result always shows stronger fluctuations than the 2D case.

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“…Hot jet initiation has been investigated numerously (Medvedev et al, 2005;Liu et al, 2012;Iglesias et al, 2012); yet, only a few studies have been carried out in supersonic combustible mixtures. Ishii et al (Ishii et al, 2009) investigated experimentally detonation initiation and propagation using a hot jet in high-speed combustible flows where the Mach numbers are 0.9 and 1.2.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Detonation Control Using a Pulse Hot Jet in Supersonic Combustible Mixture

Cai

Liang

Deiterding

2016

Combustion Science and Technology

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Abstract:To investigate the mechanism of detonation control using a pulse hot jet in the supersonic hydrogen-oxygen mixture, high-resolution simulations with a detailed reaction model were conducted using an adaptive mesh refinement method. After the successful detonation initiation, a contractive passway was generated between the hot jet and the main flow field behind the detonation front. Due to the contractive passway, the expansion of detonation products was prevented, hence resulting in overdriven detonation. By setting up various contractive passways through adjusting the width of the hot jet, the overdrive degree of overdriven detonation also changes. It is suggested that the width of the hot jet has approximately linear relation with the relative and absolute propagation velocities. When the contractive passway gradually disappeared after the shutdown of the hot jet, overdriven detonation attenuated to the dynamically stable Chapman-Jouguet (CJ) detonation. When the contractive passway was re-established once again after the re-injection of the hot jet, the CJ detonation developed to the same overdriven detonation, indicating that the contractive passway controlled by the pulse hot jet can indeed control detonation propagation in the A c c e p t e d M a n u s c r i p t 2 supersonic combustible mixture to some extent.

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Hydrogen detonation and fast deflagration triggered by a turbulent jet of combustion products

Cited by 33 publications

References 12 publications

Limits and mechanism of detonation re-initiation behind a multi-orifice plate

Limits and mechanism of detonation re-initiation behind a multi-orifice plate

Adaptive mesh refinement based simulations of three-dimensional detonation combustion in supersonic combustible mixtures with a detailed reaction model

Numerical Investigation on Detonation Control Using a Pulse Hot Jet in Supersonic Combustible Mixture

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