Railways Technical Ability Turbomachinery Question Bank Turbomachinery

  • question_answer The critical value of Mach number for a subsonic airfoil is associated with sharp increase in drag due to local shock formation and its interaction with the boundary layer. A typical value of tills critical Mach number is of the order of

    A) 0.4 to 0.5                     

    B) 0.75 to 0.85

    C) 1.1 to 1.3                     

    D) 1.5 to 2.0

    Correct Answer: C


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