Distinctive in that they differentiate an engine from other engines.
I have a synthetic data of engine parameters (speed, torque, pressure) and want to analyse them to see if I can identify distinctive identifiable characteristics of the engine.
How do I tackle this?
what characteristics should I be expecting to find?
What techniques would be efficient?
Simply sonics and acoustic properties
Each engine design differs in materials used size/shape number of moving parts amount of gas forced through and therefore differing resonances.
The external baffles and cowlings of jets also effect the noise.
Props having no baffles produce that deep bass through vibration as they cut through the air and in the case of the helicopter blade these may be running close to the sound barrier at the tip resulting in mini sonic booms
Igiri,
Off the toip of my head, purely from a view of an engine as a source of motive force;
Thrust per unit mass flux of fuel (at a given altitude and speed: so, 3D curves)
Cost per unit thrust (!)
Fuel consumption rate per unit thrust (again, functions of speed and altitude)
Mass per unit thrust
etc.
The number of engines and their arrangement also vary. This plays a very important role.
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