Abstract:  In order to study the temperature profile of horizontally oriented jet fire impinging on the vertical plate, numerical simulation software was used to simulate the rectangular leakage port methane jet fire with different aspect ratios. The temperature distribution features on horizontal and vertical direction over obstruction surface were analyzed. Results show that the leakage velocity and aspect rate of orifice have a significant effect on the temperature distribution over obstruction surface. The larger the leakage velocity, the wider the temperature rise area, but the width of temperature rise area decreases as the aspect rate of orifice increasing. The temperature rise area increases at vertical and transverse direction with the increasing velocity.Meanwhile, the larger aspect rate of orifice results in the thicker temperature rise area and varies width of temperature rise area.

Key words:  jet fire; temperature distribution, rectangular orifice, flame plume over the wall