Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7720216 | International Journal of Hydrogen Energy | 2014 | 7 Pages |
Abstract
Field experiments of a high pressure release of hydrogen gas inside a 6Â m long, 0.9Â m wide, and 0.8Â m high channel have been performed, to validate the Froude scaling and to obtain pressure and flame speed data in an inhomogeneous hydrogen-air cloud. Froude scaling with a length scale corresponding to the height of a 100% hydrogen layer in the channel was used to describe the flow of the hydrogen-air cloud in the channel. The estimated time of ignition based on the Froude scaling for release pressures of 100Â bars and 150Â bars agreed well with the experiments. At lower release pressures the estimated time was lower, which was most likely caused by dilution of the front of the hydrogen cloud. High speed video was used to record the flame speed. For the present experimental conditions it appeared that the deflagration taking place closer to the jet source determines the maximum explosion pressure.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Kanchan Rai, Dag Bjerketvedt, André V. Gaathaug,