Self-ignition of a fuel gas upon pulsed efflux into an oxidative medium

Баженова, Т. В.; Bragin, Maxim; Golub, V. V.; Иванов, М. Ф.

doi:10.1134/s106378500603028x

Cited by 13 publications

(7 citation statements)

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“…Numerical studies by Bazhenova et al [4], Liu et al [5], and Xu et al [6,7] were focused on unconfined release from high-pressure storage directly into the atmosphere. While spontaneous ignition for direct release into the atmosphere was predicted by numerical simulations, no experimental proof exists to date.…”

Section: Introductionmentioning

confidence: 99%

Pressure limit of hydrogen spontaneous ignition in a T-shaped channel

Bragin

Makarov

Molkov

2013

International Journal of Hydrogen Energy

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Large eddy simulation Pressure relief device Eddy dissipation concept Detailed chemistry a b s t r a c t This paper describes a large eddy simulation model of hydrogen spontaneous ignition in a T-shaped channel filled with air following an inertial flat burst disk rupture. This is the first time when 3D simulations of the phenomenon are performed and reproduced experimental results by Golub et al. (2010). The eddy dissipation concept with a full hydrogen oxidation in air scheme is applied as a sub-grid scale combustion model to enable use of a comparatively coarse grid to undertake 3D simulations. The renormalization group theory is used for sub-grid scale turbulence modelling. Simulation results are compared against test data on hydrogen release into a T-shaped channel at pressure 1.2e2.9 MPa and helped to explain experimental observations. Transitional phenomena of hydrogen ignition and self-extinction at the lower pressure limit are simulated for a range of storage pressure. It is shown that there is no ignition at storage pressure of 1.35 MPa. Sudden release at pressure 1.65 MPa and 2.43 MPa has a localised spot ignition of a hydrogen-air mixture that quickly self-extinguishes. There is an ignition and development of combustion in a flammable mixture cocoon outside the T-shaped channel only at the highest simulated pressure of 2.9 MPa. Both simulated phenomena, i.e. the initiation of chemical reactions followed by the extinction, and the progressive development of combustion in the T-shape channel and outside, have provided an insight into interpretation of the experimental data. The model can be used as a tool for hydrogen safety engineering in particular for development of innovative pressure relief devices with controlled ignition.

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Section: Introductionmentioning

confidence: 99%

Pressure limit of hydrogen spontaneous ignition in a T-shaped channel

Bragin

Makarov

Molkov

2013

International Journal of Hydrogen Energy

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“…The experimental and numerical minimum values of pressures and temperatures which cause the ignition of hydrogen are represented in [2e4]. Influence of diameter of orifice, through which hydrogen discharges, on the possibility of ignition is represented in [4,5]. The actions of obstacles, channel cross section and channel length are presented in [6e8].…”

Section: Introductionmentioning

confidence: 99%

The influence of diaphragm rupture rate on spontaneous self-ignition of pressurized hydrogen: Experimental investigation

Головастов

Bocharnikov

2012

International Journal of Hydrogen Energy

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“…In the numerical model of [9] vortex rings are seen most distinctly at t с * ¼ t* ¼ 13.18 and t* ¼ 20.24. Note that the most detailed picture of the structure of an axisymmetric flow at the jet startup into the atmosphere can be seen on interferogram [10] that are obtained, however, in the case of nitrogen outflow at a low stagnation pressure (3.4 MPa).…”

Section: Resultsmentioning

confidence: 98%

“…40 MPa, D ! 4 mm [10], P 0 ¼ 15e40 MPa, D ! 3 mm [11]), a hydrogeneair mixture will self-ignite in the region of contact surface behind the bow shock wave in the displaced air.…”

Section: Introductionmentioning

confidence: 99%