Auxiliary Power Unit Aircraft Function

An mt is a mechanism that uses the flow of a gas to convert thermal energy into mechanical energy.

Auxiliary power unit aircraft function.

2 3 6 the combustible usually gas is mixed in the combustion chamber with air. The technology used in the mt is derived from diesel engine turbochargers aircraft auxiliary power systems and automotive designs mts consist of a compressor combustor turbine and generator as shown in fig. Auxiliary power units are usually found on large aircraft and naval ships as well as some large land vehicles. An auxiliary power unit also known as apu is a device on a vehicle that provides energy for functions other than propulsion.

Apu generators provide auxiliary electrical power for running aircraft systems on the ground when the main engines aren t running and no ground electrical power is available. Shaft power for other pneumatic and hydraulic systems. Applications include powering environmental systems for pre cooling or preheating the cabin and providing power for crew functions such as preflight cabin cleanup and galley kitchen operation. An auxiliary power unit or apu allows an aircraft to operate autonomously without reliance on ground support equipment such as a ground power unit an external air conditioning unit or a high pressure air start cart.

Knowing this will be an explanation of auxiliary power units apu and how they are involved in the operation of an aircraft. Design of auxiliary power unit apu for co operation with turboshaft engine p 9 the section that comes below presents types of aircraft engines. Please like and subscribe. Aircraft apus generally produce 115 v alternating current ac at 400 hz rather than 50 60 hz in mains supply to run the electrical systems of the aircraft.

In airliners apu s are usually located at the very rear of the aircraft below the tail. Pneumatic power for cabin air conditioning systems. Apu is necessary to start up the main engines it also powers the airplane s electronics. Apu is the smallest engine on airplanes.

Starting power for the main engines. How an auxiliary power unit works.