asteroza + counterrotating   11

Transactions of the Symposium on Space Nuclear Power Systems, (5th) Held at Albuquerque, New Mexico on January 11, 1988. | National Technical Reports Library - NTIS
The PDF contains info on wheelguns, giant counterrotating flywheel hoops in space to supply power to SDI weapons, mainly railguns/particle accelerator cannons/free electron lasers that need huge amounts of power right now. Appears to expect to be trickle charged over time by a small space nuclear reactor (SNAP? atomic teakettle?). Also has an interesting microwave power beaming scenario from a nuke in mars synchronous orbit to a ground rover, high performance radiators, including a fabric heatpipe radiator, a curie point magnetic liquid droplet radiator, and other power conversion concepts.
SDI  wheelgun  space  counterrotating  flywheel  hoop  energy  storage  power  generator  FEL  free  electron  laser  railgun  neutraal  particle  accelerator  cannon  military  WPT  microwave  transmission  mars  MSO  rectenna  rotating  loop  pulsed  fabric  radiator  heat  thermal  management 
march 2018 by asteroza
Feadship launches Savannah, the world’s first hybrid superyacht - Feadship Royal Dutch Shipyards
Interesting series hybrid electric propulsion. Single fixed skeg shaft propeller close coupled with a slipstreaming azimuthing tractor thruster propellor that counterrotates.
hybrid  yacht  superyacht  slipstream  azimuthing  thruster  ship  vessel  propulsion  vehicle  transportation  counterrotating  Delicious 
february 2015 by asteroza
An experimental study on the effects of relative rotation direction on the wake interferences among tandem wind turbines - Springer
Interesting result. Basically, if you close pack turbines, make sure you evenly mix clockwise/counterclockwise rotating turbines to exploit wake turbulence effects. Which sorta goes against the common practice of having all turbines in an array of the same type/rotation. I wonder what happens if the wind turbines are not single rotor, but dual rotor counterrotating turbines? Would the counterrotation cancel out the wake turbulence for downstream turbines, negating the effects?
wind  turbine  spacing  research  HAWT  CRWT  counterrotating  wake  turbulence  aerodynamics  Delicious 
june 2014 by asteroza
PK_Klima_18-07-2007_Martens_en.pdf (application/pdf Object)
Interesting shrouded propfan research, basically stuffing counterrotating geared turbofans/propfans inside a duct/shroud, and using a recuperator in the jet exhaust to recovery energy.
MTU  germany  IRA  propfan  integrated  recuperator  recuperative  aeroengine  counterrotating  GTF  geared  turbofan  shrouded  gas  turbine  engine  propulsion  aviation  technology  research  development  CLAIRE  CRISP  Delicious 
august 2012 by asteroza

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