Annular Radiators

Discussion in 'Engines' started by gjs238, Jul 17, 2010.

  1. gjs238

    gjs238 Well-Known Member

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    The Germans seemed rather fond of annular radiators.
    What US or British aircraft may have benefitted from use of annular radiators?
     
  2. Colin1

    Colin1 Active Member

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    Hawkers gave one a crack in a Typhoon R8694, then again in a Tempest V.

    Results with the Typhoon were not spectacular, with aerodynamic drag being not much reduced over that of a standard Typhoon, though Hawkers persisted with their experimentation for over three years.

    They tried again with a Tempest V EJ518 which suffered a forced landing following engine failure. Can't find a great deal on the success or otherwise of the Tempest foray but they did move on to try a ducted spinner arrangement; this turned out to be so heavy that any gains were lost in the added weight.
     
  3. Glider

    Glider Well-Known Member

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    Its an interesting question as the British first used these with a lot of success on the SE5a.
     
  4. Milosh

    Milosh Well-Known Member

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    And a few other WW1 a/c.
     
  5. davebender

    davebender Well-Known Member

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    I suspect that resistance to battle damage was a more important factor. You don't have vulnerable radiators in the wings or fuselage connected by vulnerable coolant lines.

    If an annular radiator gets hit then the engine and/or prop was probably hit also. Hence the annular radiator hit doesn't make much difference.
     
  6. VG-33

    VG-33 Banned

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    From the radiator itself, difficult to say... They have benefitted from reduced pressure losses in the ducts. The friction aera is reduced for the same section if it's circular (geometry), also for intake LE loss coefs, and less losses (turbulencies) at angles, so better fo internal speed profiles.

    Half circular radiator could also be better adapted to rounded fuselage shape.

    Regards
     
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