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(aerospace engineering)
A device for augmenting the thrust of a jet engine by burning additional fuel in the uncombined oxygen in the gases from the turbine.



a secondary combustion chamber in certain turbojet engines that is used to augment the engine thrust for a short time (see). An engine equipped with an afterburner is called an afterburning engine.

An afterburner is situated between the turbine and the jet nozzle of a turbojet engine or a dual-cycle engine. The gas that leaves the turbine still contains much oxygen; in a turbojet engine, this gas alone enters the diffuser of the afterburner. In a dual-cycle engine, a mixture of the gas that leaves the turbine and air from a bypass duct enters the diffuser. The speed of the gas flow is reduced in the diffuser, and fuel—usually aviation kerosene—is then injected into the flow. When the fuel is burned in the afterburner, the temperature rises and the exhaust jet velocity increases.

Figure 1. Diagram of an afterburner: (1) diffuser, (2) fuel nozzles, (3) flameholders, (4) lining, (5) engine housing, (6) precombustion chamber

Flameholders are used so that the combustion process occurs over the shortest possible distance. A liner is employed to shield the walls of the afterburner. The afterburner is started by a flame from a precombustion chamber (see Figure 1).

Afterburners may also be used to boost the power of free-piston engines.

References in periodicals archive ?
As another component of the Afterburner program, Crescendo Ventures offers referrals to several marketing and public relations agencies, including Bravo
I realized the fireball was my own doing: I had activated the dump switch on downwind, and when the right engine failed, I selected afterburner to accelerate and arrest my rate of descent.
This time, however, perhaps because of nervousness and not wanting a call from the Air Boss, or not having a new set of habits for afterburner shots, I placed my hand on my kneeboard.
Loring continued, "An afterburner for a bag roaster might consume anywhere from 800k BTU/hr to 100,000k BTU/hr, if it's one of the newer more efficient ones, that turns off for part of the roasting cycle, you may average a little better than that.
The ovens have two main compartments: the lower chamber where the dewaxing is done and the upper chamber, which acts as the thermal reactor or afterburner section.
Although an afterburner does not fully eliminate the emission of these pollutants, it further combusts them, according to the EPA Control Technology Center.
Chromalloy Israel, located in Kiryat Gat, Israel, specializes in overhaul and coating of jet engine components, including turbine vanes and blades, fan blades, variable inlet guide vanes, afterburner flaps and other components.
Afterburner Wi-Fi nodes will be installed in lottery and phone card kiosks throughout China creating a true national Wi-Fi network.
They say the new F-35s won't need extra power, known as afterburner, that F-16s in most cases need to take off and that makes the planes noisy.
Washington, October 23 ( ANI ): A new image captured by astronomers shows a supersonic jet of material that looks strikingly similar to the afterburner flow of a fighter jet, blasting over two million light-years from the centre of a distant galaxy.