English: The rear part of a sectioned Rolls-Royce Turboméca Adour turbofan displayed at the Musée de l’Air in Paris, France. Air flow is from right (foreground) to left (background).

The bypass air and the core air join just before entering the afterburner section.

The afterburner with its four combustion rings is clearly seen at the center. During cruise flight, no combustion takes place there and the afterburner generates pressure loss without an increase in gas energy.