dc.contributor.author | Vågsæther, Knut | |
dc.contributor.author | Knudsen, Vegeir | |
dc.contributor.author | Bjerketvedt, Dag | |
dc.date.accessioned | 2011-05-03T13:38:27Z | |
dc.date.accessioned | 2017-04-19T12:52:28Z | |
dc.date.available | 2011-05-03T13:38:27Z | |
dc.date.available | 2017-04-19T12:52:28Z | |
dc.date.issued | 2007 | |
dc.identifier.citation | International journal of hydrogen energy 32(13), 2186-2191 | |
dc.identifier.issn | 0360-3199 | |
dc.identifier.uri | http://hdl.handle.net/11250/2438534 | |
dc.description.abstract | Flame acceleration and deflagration to detonation transition (DDT) is simulated with a numerical code based on a flux limiter centered method for hyperbolic differential equations. The energy source term is calculated by a Riemann solver for the inhomogeneous Euler equations for the turbulent combustion and a two-step reaction model for hydrogen–air. The transport equations are filtered for large eddy simulation (LES) and the sub-filter turbulence is modelled by a transport equation for the turbulent kinetic energy. The flame tracking is handled by the G-equation for turbulent flames. Numerical results are compared to pressure histories from physical experiments. These experiments are performed in a closed, circular, 4 m long tube with inner diameter of 0.107 m. The tube is filled with hydrogen–air mixture at 1 atm, which is at rest when ignited. The ignition is located at one end of the tube. The tube is fitted with an obstruction with circular opening 1 m down the tube from the ignition point. The obstruction has a blockage ratio of 0.92 and a thickness of 0.01 m. The obstruction creates high pressures in the ignition end of the tube and very high gas velocities in and behind the obstruction opening. The flame experiences a detonation to deflagration transition DDT in the supersonic jet created by the obstruction. Pressure build-up in the ignition end of the tube is simulated with some discrepancies. The DDT in the supersonic jet is simulated, but there is a discrepancy in the time of the simulated DDT. | |
dc.language.iso | eng | |
dc.publisher | Elsevier | |
dc.relation.ispartof | Vågsæther, K. (2010). Modelling of gas explosions. Doctoral thesis. http://hdl.handle.net/2282/1113 | |
dc.subject | modelling | |
dc.subject | flame acceleration | |
dc.subject | DDT | |
dc.title | Simulation of flame acceleration and DDT in H-2-air mixture with a flux limiter centered method | |
dc.type | Journal article | |
dc.type | Peer reviewed | |
dc.description.version | Accepted version | |
dc.subject.nsi | 429 | |
dc.identifier.doi | http://dx.doi.org/10.1016/j.ijhydene.2007.04.006 | |