asteroza + aviation + cycle   6

Hybrid geared-fan and piston concept could slash fuel-burn
Like old combined cycle aviation diesel designs, this appears to be either a diamond D-16, or perhaps even a deltic triangular configuration. Difference is LP turbine drives geared turbofan, while pistons drive HP compressor with no HP turbine. Makes for a supercharged diesel turboprop of sorts.
general  aviation  propulsion  combined  cycle  diesel  engine  geared  turbofan  GTF  turboprop  supercharger  turbocharger 
may 2018 by asteroza
Sagita - Home
Looks like a semi-hot cycle helicopter, but instead of a potentially more complicated tip jet drive, it appears to use dual contra rotating direct drive turbines to spin the rotors, exhausting into the inter-disk area of the rotor hub. That exhaust choice is a bit odd though, but it might increase local air velocity over the blades.
rotor  direct  helicopter  aerospace  cycle  technology  turbine  semihot  coaxial  aviation  drive  hot  VTOL  Delicious 
june 2013 by asteroza
The Superjet: Engineers at GE Aviation Are Building the Ultimate Jet Engine | GE Reports
Thing is, the tech path for this leads to a similar family of engines, like the J58 that powers the SR-71 (two path engine with outer duct not behind a compressor and used as a ramjet), and SERJ (technically a two path where you have part of the compressor flow go to a combustor and turbine segment, while the rest flows to a ramjet combustor only). Probably the basic difference between ADVENT and SERJ is a lack of subsonic ramjet combustor and an air bleed path.
ratio  bypass  research  technology  propulsion  aerospace  aviation  engine  turbojet  cycle  variable  military  ADVENT  GE  Delicious 
january 2013 by asteroza
19960021025_1996043871.pdf (application/pdf Object)
RIME (Rocket Induced Magnetohydrodynamic Ejector) rocket design for an electric air breather rocket ejector ramjet of sorts. Robs power from the rocket exhaust via MHD generator to power the generator magnets, the air ionizer, and the MHD accelerator.
RENE  RIME  space  spacecraft  aerospace  aviation  research  technology  propulsion  rocket  MHD  generator  accelerator  cycle  electric  air  ejector  ramjet  Delicious 
june 2012 by asteroza

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