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A pneumatic motor (air motor), or compressed-air engine, is a type of motor which does mechanical work by expanding compressed air. Pneumatic motors generally convert the compressed-air energy to mechanical work through either linear or rotary motion. Linear motion can come from either a diaphragm or piston actuator, while rotary motion is ...
The compressed air is channeled through the combustors, where it is mixed with fuel and burned, and the resulting combustion gases are expanded through first the gasifier turbine, which is on the same shaft and is used to drive the rotary compressor, then through the power turbine, which is on the output shaft. [1]: 43–44
A pneumatic motor or compressed-air engine uses the expansion of compressed air to drive the pistons of an engine, turn the axle, or to drive a turbine. The following methods can increase efficiency: A continuous expansion turbine at high efficiency; Multiple expansion stages; Use of waste heat, notably in a hybrid heat engine design
The major problem with these cars and all compressed-air cars is the lack of torque produced by the "engines" and the cost of compressing the air. [ 13 ] Since 2010, several companies have started to develop compressed air cars , including hybrid types that also include a petrol-driven engine; none has been released to the public, or have been ...
Eolo is the first compressed air-powered car. It was invented by Guy Nègre. Motor Development International (MDI) licensed the patent. It was unveiled during the 2001 Bologna Motor Show car and bike fair. An attempt to put it into production failed in 2003. The engine was sold as a power generator with zero emissions.
The air compressed by the compressor bypasses the combustor and turbine section of the engine, where it is mixed with the turbine exhaust. The turbine exhaust can be designed to be fuel-rich (i.e., the combustor does not burn all the fuel) which, when mixed with the compressed air, creates a hot fuel-air mixture which is ready to burn again.
The compressed air is heated in the combustor and passes through the turbine, then expands in the nozzle to produce a high speed propelling jet [3] Turbojets have a low propulsive efficiency below about Mach 2 [ citation needed ] and produce a lot of jet noise, both a result of the very high velocity of the exhaust.
Recuperator – a fixed cylindrical regenerative heat exchanger that extracts waste heat from the exhaust gases and uses it to preheat the compressed air Rotating Gas Producer – the five-stage, dual-spool compressor which achieves a 14.5:1 compression ratio at full power, driven by the compressor turbine, which operates with a maximum turbine ...