Hello... new to forum.... I am looking into design of a forced air turbine that will drive a generator and flywheel. The flywheel would be utilized for short periods of zero air supply and as an energy resevoir to maintain revs at an optimum level. Dimensions: Turbine/AC generator/flywheel = approximately 450 mm dia. x 900 mm hgt. Air feed : Volume? = velocity = 100 Kph; inlet area = 1800 mm x 600 mm reduced to a variable orfice/nozzle (?) at turbine inlet. I'm also curious as to what the force of this pressurized stream would be. I'm not familiar with the calculations to derive CFM from my aformentioned dimensional constraints but I would guess that they would need to be determined in order to carry out the following work. Generator : synchronous-type alternating current (ac) generator that rotates at high speeds up to 10,000 rpm. Will need to produce 500 V and power output of 30 kw. Rotor weight would be approximately 15 -18 Kg. I may be able to source this generator "off the shelf". Flywheel : Should be of sufficient mass to sustain rotor at 3,000 rpm for 5- 25 minutes. Weight = ? There will be a DC start up motor for the flywheel at start. I guess my primary question is what type of turbine am I looking for? I'd like to orient this assembly in a vertical stack. Oh..... would magnetic bearings help efficiency? Would this magnetic levitation create a great deal of parasitic loss to output? I won't need a lot of torque (hopefully) as that is what I propose as the flywheel's function, i.e. : a damper for torque loads and to maintain some rpm. But I do want to sustain rpm via air flow. Would a multi vane, multi stage turbine somewhat akin to a power plant steam generator on a small scale be the ideal design? My background is in applied high energy physics and I remember that turbo molecular pumps had a very high efficiency, granted, at ultra low inlet densities. I tend to think of these little guys because they were compact, vertical, multi stage units.... Thanks! Ron S.