Experimental study on flame geometric of horizontal jet fire inpinging a facing wall and side wall

Abstract

This work focuses on investigating the characteristics of restricted horizontal jet fire caused by fuel leakage as a pipeline or tank fracture. The study aims to quantify the effect of the exit velocity and nozzle-facing wall distance on the flame height and width, as well as developing a new non-dimensional heat release rate Qn* to better characterize the flame geometry. The study conducted three nozzle-facing wall distances (0.05, 0.10, and 0.15 m) with varying fuel ejection speeds from 1.04 to 6.25 m/s. Results show that the flame height and width increase with both the nozzle-facing wall distance and fuel ejection speed. The side wall constrains the air entering into the fire plume, which pushes the flame closer to the side wall. A new non-dimensional heat release rate Qn* was proposed on the basis of plate-nozzle distance, that the flame height and width fit well with the 1/4 and 2/5 power of Qn*, respectively. The global model was developed for flame size under multiple restrictions. The findings of this study are crucial in improving our understanding of the restricted horizontal jet fire accidents caused by fuel leakage and can aid in developing measures to minimize potential casualties and economic losses.