Moderators: richierich, ua900, PanAm_DC10, hOMSaR

 
Blackbird
Topic Author
Posts: 3384
Joined: Wed Oct 06, 1999 10:48 am

Turbine Cooling Tech Questions

Wed Jan 24, 2007 10:42 am

Was some turbine cooling technology patented? For example GE's J-93 first turbine stage featured hollow with holes drilled in the rear of the blades, and GE-used this in later designs.

BTW: While not turbine cooling related, I felt like asking anyway-- was variable stators ever patented?

-Andrea K
 
kaddyuk
Posts: 3697
Joined: Thu Nov 08, 2001 1:04 am

RE: Turbine Cooling Tech Questions

Wed Jan 24, 2007 11:18 am

Whoever said "laughter is the best medicine" never had Gonorrhea
 
grandtheftaero
Posts: 247
Joined: Sat Nov 29, 2003 1:05 pm

RE: Turbine Cooling Tech Questions

Thu Jan 25, 2007 1:11 am

Quoting Blackbird (Thread starter):
was variable stators ever patented?

According to About.com, Gerhard Neumann of GE was awarded 8 patents for inventing variable stator vanes. Those patents were either very loosely worded or have long since expired since Pratt and Whitney uses VSVs too. I think Roll-Royce even tried them out once but proved to themselves that and extra spool was the way to go for operability. Even Chrysler used variable stators in their turbine-powered car. Today high end turbochargers have variable vane geometry, too
 
Blackbird
Topic Author
Posts: 3384
Joined: Wed Oct 06, 1999 10:48 am

RE: Turbine Cooling Tech Questions

Thu Jan 25, 2007 2:17 am

When did Gerhard Neumann get his patents, and when was the first time Pratt used Variable Guide-Vanes?

Andrea K
 
grandtheftaero
Posts: 247
Joined: Sat Nov 29, 2003 1:05 pm

RE: Turbine Cooling Tech Questions

Thu Jan 25, 2007 4:05 am

The J79 was the first engine to use VSVs and it was a 1950s era engine so I assume the patents were awarded around that time.

I don't know enough about PW to tell you about their use of VSVs. Maybe a Google search will turn up something.
 
TimT
Posts: 168
Joined: Sun Jun 03, 2001 1:38 pm

RE: Turbine Cooling Tech Questions

Fri Jan 26, 2007 3:30 pm

I can't say anything about all of the RR engines, but the RB-211-22B uses VSV's. I used to climb in the cold stream duct to adjust them.

Who is online

Users browsing this forum: No registered users and 33 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos