Non-fueled, bladeless, minimally-noisy aviation engine --- Science fiction or real theoretical science?
Electric propulsion using ion thrusters is already in use for space applications. Today's ion thrusters deliver very high specific impulse at low power (typically in the order of 10 to 1000 W). Lower or higher outputs are possible and subject of current research and development. 
Ion thrusters work great in the vacuum/free fall environment where low thrust over long durations is useful, and electric energy can be generated on the spot with solar panels.

The usage of ion thrusters in the atmosphere is possible, but there are major challenges:


planes require a lot of thrust during take-off
the propellant does not contain the energy to drive the thruster
the atmospheric pressure changes all the working paramters. Existing ion thrusters for space are not useful in the atmosphere.


Today, ion thrusters are not ready for aviation and it might never happen, but there is some research going in this direction. Personally I do not believe that ion thrusters are useful for low altitude, but I can well imagine a scramjet engine for high altitude using ion thrust technology. In any case, even an ion thruster without any moving parts cannot be silent when working in the atmosphere. The particles expelled at very high speed will create a lot of noise, similar to a welding torch.