Auxiliary Power Unit Aircraft Function

Knowing this will be an explanation of auxiliary power units apu and how they are involved in the operation of an aircraft.

Auxiliary power unit aircraft function.

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. An auxiliary power unit also known as apu is a device on a vehicle that provides energy for functions other than propulsion. Apu is necessary to start up the main engines it also powers the airplane s electronics. How an auxiliary power unit works.

Auxiliary power units are usually found on large aircraft and naval ships as well as some large land vehicles. The auxiliary power unit apu is a small gas turbine engine mounted in the tail cone of an aircraft to provide autonomous electrical and mechanical power for the following. Starting power for the main engines. In airliners apu s are usually located at the very rear of the aircraft below the tail.

Shaft power for other pneumatic and hydraulic systems. 2 3 6 the combustible usually gas is mixed in the combustion chamber with air. 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. Please like and subscribe.

Pneumatic power for cabin air conditioning systems. An auxiliary power unit apu is a device on a vehicle that provides energy for functions other than propulsion they are commonly found on large aircraft and naval ships as well as some large land vehicles. An mt is a mechanism that uses the flow of a gas to convert thermal energy into mechanical energy. 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.

Design of auxiliary power unit apu for co operation with turboshaft engine p 9 the section that comes below presents types of aircraft engines. Others can produce 28 v.