Flame Length and Width Produced by Ejected Propane Gas Fuel from a Pipe

Abstract

Flame tip height, width, and height to base of a lifted flame, formed by a ejected fuel gas through a pipe of 1/8B, 1/4B, 3/8B, 1/2B, 3/4B, and 1B, were observed as a function of dimensionless heat release rate. Fuel gas was supplied at the rate of 100l/min, 200l/min, and 400l/min. Pipe heights from the ground level were set at 200mm, 700mm, and 1700mm. Radiative heat fluxes were also measured at 0.1m, 0.27, 0.71m, 1.1m, 1.27m, 1.71m, 1.9m, 2.9m, from the pipe. Temperatures along the center line of the flame were measured. Dimensionless flame height. Ha/D, and dimensionless flame width, Wf/D were correlated well by 1/3 power of dimensionless heat release rate. Radiative heat fluxes to the dummy vessel were also estimated using the view factor and center-line temperature. Estimated radiative heat fluxes to the targets were compared with the measured ones and good agreement between them was obtained. This implies that the view factor on radiative heat flux to the target from a jet flame is useful to estimate the radiative heat flux to assess the fire safety.