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Novel engine design

  1. Sep 23, 2004 #1
    I decided to try my hand at initiating a discussion. In particular, I'm interested in what others think about the rather novel (Brayton Cycle) engine design at (www.starrotor.com) and its claims? It's, in principle, the same type of continuous burn engine as in jet aircraft, but with somewhat simpler design and less requirement for exotic materials. Note in particular, their efficiency claims. If it works as planned, it might be interesting.

    KM
     
  2. jcsd
  3. Sep 27, 2004 #2

    DaveC426913

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    Gold Member

    link rotted
     
  4. Sep 27, 2004 #3
    The link works just fine!

    KM
     
  5. Sep 27, 2004 #4

    russ_watters

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    Maybe its just for the prototype, but a 6:1 compression ratio means pretty low efficiency - worse than a regular car (otto cycle) engine. Regardless, they are still pretty early in the development. We'll need to wait and see. I'm definitely in favor of brayton cycle engines in cars if its feasible though.
     
    Last edited: Sep 27, 2004
  6. Oct 1, 2004 #5
    Actually I think that you're applying the limitations of an Otto cycle to the Brayton cycle. Gas turbines and jet engines have low compression ratios but high volume flows.

    KM
     
  7. Oct 1, 2004 #6
    A higher compression ratio is still better.

    KM
     
  8. Nov 8, 2004 #7
    Interesting concept. I think it seems like it will eventually be quite feasible, if not soon. It would be cool to see this go into production. :cool:
     
  9. Oct 27, 2009 #8
    It looks pretty good. But hot gas is corosive. Also heat make things expand, which would spoil close fit. Lots of leakage! They don't have a prototype running, which tells you how hard it is. Pistons with piston rings is hard to beat! Wes Hughes
     
  10. Nov 10, 2009 #9
    Lets not forget the original rotor engine. Those are harder to beat, fewer moving parts = longer life. Plus better efficiency. Rotor engines have been in use for decades, the starrotor just looks like an American redesign. About time, too, sometimes we're pretty slow on the uptake.
     
  11. Nov 10, 2009 #10
    Deleted previous message: As i'm talking rubbish and thinking of something else altogeher.

    Interesting idea, the efficiency claims aren't outside the realm of possibility either.
     
    Last edited: Nov 10, 2009
  12. Nov 10, 2009 #11

    mgb_phys

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    Isn't a Brayton cycle isobaric?
    The combustion chamber is open to the output turbine - there isn't anything to seal.
     
  13. Nov 10, 2009 #12

    stewartcs

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    FYI...this thread is like 5 years old...LOL!

    CS
     
  14. Nov 10, 2009 #13
    Balls! Can't belive I didnt notice that.
     
  15. Nov 10, 2009 #14
    Wow! Has it been that long. I feel old.

    KM
     
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