2026-04-17T06:49:36Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1162602026-02-07T12:03:54Zcom_2072_1033col_2072_452950

urn:hdl:2117/116260 Prediction of lift-off distance in choked and subsonic hydrogen jet fires Bradley, Dereck Casal Fàbrega, Joaquim Palacios, Adriana Àrees temàtiques de la UPC::Enginyeria química Fuels Jet planes--Fuel Choked flow Flame height Fuel Jet flame Lift-off distance Combustibles Hydrogen jet flames, as a consequence of their greater reactivity, have a number of characteristics that are different from other flames. These are reviewed, as are the various attempts that have been made to characterise, and generalise, the lift-off distance at the base of jet flames. There has been a consistent improvement in the accuracy of the expressions for the prediction of lift-off distance. In addition to the greater reactivity that creates a small laminar flame thickness, allowance must be made for the significantly smaller air requirement for each mole of hydrogen fuel. The evolution of an expression for the lift-off distance is discussed and a new expression is provided. Alongside the blow-off data for lifted flame regimes, this enables hydrogen lifted flames to be fully characterised. Peer Reviewed Postprint (author's final draft) 2017-11-23 Article http://www.sciencedirect.com/science/article/pii/S0920586117307885?via%3Dihub Open Access