Analyses ondynamicalprocess of high pressure combustible gasleakage and thermal hazard ofjet fire

This paper reviews the jet fire due to the leakage of combustible gas in high pressure vessels. The physical models are given and analyzed for the state physical parameters of steady-state gas flow at the leakage orifice, the flame geometry and size of jet fire after the ignition of the leakage gas, and jet flame radiant heat flux, respectively. The high pressure gas leakage models are extensively introduced respectively based on the ideal gas and Abel-Noble state gas equations, then theflame length model, flame width model and lift-off height model are presented to predict the jet flame geometry and size, finally the point source radiation model, multipoint source radiation model, solid flame radiation modeland line source radiation model are given and compared. The three kinds of physical models are linked and coupled to analyze the thermal hazard of jet fire at different leakage conditions. Analysis shows the considerable application of the linked physical model.