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Discussion :: Compressors, Gas Turbines and Jet Engines

  1. If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity

    2. A.

     Vi = Vo
    B.

     Vt > Vo
    C.

     U < Vo
    D.

     V = Uo

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    Answer : Option A

    Explanation :

    If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity Vi = Vo

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