Captured through a circular opening, intense orange flames lick upwards within a dark, likely confined space

Captured through a circular opening, intense orange flames lick upwards within a dark, likely confined space. The background is a textured, dark grey, possibly the inner wall of a furnace or combustion chamber. The flames are concentrated towards the right, curling and twisting dynamically. Streaks of light reflect off the surrounding surface, adding depth to the scene. The overall impression is that of heat and controlled burning.