Faro From Egypt, joined Aug 2007, 1490 posts, RR: 0 Posted (4 years 3 weeks 3 days 22 hours ago) and read 3259 times:
Beyond GTF, open rotors and contra-rotating stages, what innovations in materials are presently being R&D'ed by turbine engine manufacturers? Which of these innovations can we reasonably expect to see implemented within the next 5 years and which between 5-10 years?
Faro From Egypt, joined Aug 2007, 1490 posts, RR: 0 Reply 2, posted (4 years 3 weeks 3 days 18 hours ago) and read 3219 times:
Quoting Oly720man (Reply 1): Improved high temperature coatings for turbine blades seems to be one that has promise.
Very interesting development, I wonder when we may see it implemented. Any other technology candidates out there?
I wonder whether materials science has reached a plateau with respect to turbines, it seems that most of future efficiencies will be coming from innovations in mechanics rather than materials. At one point I believe that advances in turbine technology were to a large extent due to advances in materials.
DTManiac From Germany, joined Aug 2004, 689 posts, RR: 16 Reply 4, posted (4 years 2 weeks 2 days 19 hours ago) and read 2887 times:
Quoting Tdscanuck (Reply 3): if they can ever get ceramics to play nice, that will be a huge leap though.
I guess the same would apply for TiAl alloys. Research is still performed on that. If one manages to increase ductility a bit this might open up a new range of applications. The low weight could lead to a significant weight reduction and thus fuel burn.
Jetlife2 From United States of America, joined Jul 2006, 217 posts, RR: 25 Reply 5, posted (4 years 2 weeks 1 day 3 hours ago) and read 2742 times:
Quoting Tdscanuck (Reply 3): In addition to better coatings, they're always playing with the airfoils...3D airfoils are just starting to become the norm and I would suspect they'll keep tweaking that for some time to come.
Blisks are partly manufacturing, partly material, but promise significant weight savings...I'm not sure if they're in the commercial world yet but they're in military engines now.
The easy material advances seem to be behind us...if they can ever get ceramics to play nice, that will be a huge leap though.
This is a good list. 1. 3D aero: evident in all the latest fan blades (GE90-115B, GEnx) and continues on the inside, gets better every generation; 2. Blisks: Yes they are in many commercial engines already. The GE90-115B has a first stage compressor blisk as big as some engine's fan stages...GEnx has more stages as blisks. 3. Ceramics: Definitely on the list for the future. Many technology demonstrators have been run and they are in use already in some military engines. Still some hurdles to overcome (cost being one) 4. Materials science in general (metals): the state of the art now is that properties can be predicted from chemistry, thus allowing the alloy to be designed and optimized before making any; (composites) Just getting better and better. Analysis techniques have grown up and now they are not only practical but desirable from all angles: weight, strength, cost. You will see more and more of the engine going this way.
Faro From Egypt, joined Aug 2007, 1490 posts, RR: 0 Reply 6, posted (4 years 2 weeks 22 hours ago) and read 2703 times:
Quoting Jetlife2 (Reply 5): 3. Ceramics: Definitely on the list for the future. Many technology demonstrators have been run and they are in use already in some military engines. Still some hurdles to overcome (cost being one)
Very interesting, in use on which operational military engines exactly? In the hot end I presume, but as lining or turbine blade?