Question

Why have gas turbine engines almost completely replaced piston engines on new corporate-sized twin-engine aircraft?

Answer 1

• A gas turbine (combustion tubine) is a type of internal combustion engine which uses gases flamable gases or light distillate petrolium product like gasoline which happen to be available locally,though natural gas is most commly used as working fluid.The basic principle of gas turbine is a Brayton cycle (air as working fluid).
• Application of gas tubine engines :-Gas tubine engine is used to propell air crafts and ships,running a compressor or generating elctrical power etc.
• Now gas engine turbines alomost completely replaced piston cylinder engines on new corporate-sized twin-engine aiircrafts.The gas engines usage intead of piston engine have various benifts as follows :-

1. Power to weight ratio :-Gas engine have capacity to generate higher power to weight ratio.Piston engines are bulky,heavier against gas turbine for the same power output.
2. Thermal efficiency :-Gas turbines operates at very high temperature,so it have high thermal efficiency than the piston engine.
3. Compactness :-The gas tubine engine is more compact than the piston engines,so it need less space as compare to the pistion engine.It have simpler design than piston engine.
4. Fewer moving parts :-In the gas tubine lesser moving parts as compare to the piston engine.In piston engine due to many moving components it have some problem regarding the stabilty(higher inertia)and erosion.
5. Reduced emmision :-The gas tubine engine also have less emmision than the piston engine.
6. Reliabilty :-Gas tubine engine are almost hundred of time reliable than the piston engines.There is no fear to fail the parts of the gas engine due to vibration.They are also many times more powerful than the piston engines ever made.Gas tubine can be scaled upto 20 times much.

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