3P18U3/78

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The 3P18U3/78 application field and working principle is a valuable topic to discuss. The 3P18U3/78 was originally designed as an airplane auxiliary power unit (APU) – designed to provide power for aircraft when the aircraft’s engines are shut down for maintenance, repair or other reasons. It was developed by the French aerospace company Turboméca and is produced in the form of a pre-packaged complete APU system ready for use. This is considered to be a major improvement on the previous design of APU in terms of cost and flexibility.

The 3P18U3/78 is mainly used as a combined starter and generator - a type of APU unit that can be used to start an airplane\'s engines. Apart from this, the 3P18U3/78 also offers other uses such as providing power for lights, avionics, and other auxiliary services. The 3P18U3/78 is powered by an auxiliary gas turbine, which requires no external power source and produces up to 3500 Kw of power at a continuous power output of up to 200 Kw.

In general working principle, when the APU turbine is activated, the compressor draws in ambient air, compresses it, then passes it to the combustor. This combustor then mixes fuel with the compressed air and ignites this fuel-air mixture. The combustion of the fuel-air mixture then creates an expansive force which is utilized by the turbine to produce mechanical power. The generated mechanical power is then converted to electrical power. The electrical power is then used for starting and running the airplane’s engines and also for other services like lighting and avionics.

In conjunction with its integral starter generator, the APU 3P18U3/78 also offers other noteworthy features, such as a provision for an engine bleed air anti-surge valve that provides bleed air capability to prevent engine surge. It also has a lightweight construction and compact size which allows it to be deployed in tight and small engine bays. The 3P18U3/78 is also equipped with internal recirculating and cooling systems that provide additional energy savings.

Overall, the 3P18U3/78 is a very useful and versatile APU unit that can be used for various applications. It is lightweight, efficient, cost-effective and has a simple and straightforward operating principle. It is easy to install and maintain and can provide a reliable source of power for aircraft when the engines are not running. The APU 3P18U3/78 is a great example of engineering excellence and can be used in a wide range of aircraft, from small private airplanes to large commercial airliners.

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