Investigation of starting process of a movable intake configuration at high supersonic speeds

Manisankar, C and Sajeer, Ahmed and Thiagarajan, V (2010) Investigation of starting process of a movable intake configuration at high supersonic speeds. In: Proceedings of the 13th Asian Congress of Fluid Mechanics, 17-21 Dec 2010, Dhaka, Bangladesh.

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    Abstract

    Starting of an intake is an essential aspect while considering the design of intake geometry (ref.1). It is necessary to have the size of intake reduced for a given size of combustion chamber. In a supersonic intake configuration of type having fixed cowl, its length and ramp angle is designed to have the shock generated from the cowl located on the expansion corner at the design Mach number; so as to have the maximum pressure recovery and avoid viscous losses due to shock boundary layer interaction. Fixed ramp configurations provide good starting characteristics but their size for a given combustion chamber size could be reduced by having a variable contraction ration with a movable cowl i.e., to have a contraction ratio of 1.0 or larger to enable starting of flow through intake and reduce the contraction ratio later by moving the cowl to the design angle to have the shock located at the expansion corner. Intakes based on this concept are preferred as they provide lower drag due to its size and by controlling the cowl length and its rotation, the operational envelop can be increased.

    Item Type: Conference or Workshop Item (Paper)
    Uncontrolled Keywords: Supersonic speeds;0.3m trisonic wind tunnel;Cowl deflection
    Subjects: AERONAUTICS > Aeronautics (General)
    AERONAUTICS > Aerodynamics
    Division/Department: Experimental Aerodynamics Division, Experimental Aerodynamics Division, Other
    Depositing User: Ms. Alphones Mary
    Date Deposited: 03 May 2012 10:13
    Last Modified: 03 May 2012 10:13
    URI: http://nal-ir.nal.res.in/id/eprint/10439

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