The Influence of a Forward Splitter Plate on Base Pressure and Drag of Wedges

Rajeev Kumar, - and Viswanath, PR (1997) The Influence of a Forward Splitter Plate on Base Pressure and Drag of Wedges. Technical Report. National Aerospace Laboratories, Bangalore,India.

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    Abstract

    Experiments have been performed to assess the base and total drag reduction due to a forward splitter plate (FSP) on two wedge model shaving semi-apex angle of 12 and 30 deg. Two splitter plates having a length of H and 3.2H (where H represents the base height)respectively were used. The tests were made at a subcritical Reynolds number of 4 x 10 and the wake survey method was utilised to determine the total drag. The results show virtually no changein base pressure due to FSP on both the models. The total drag onthe other hand was about 9 'and 4% lower for the 30 and 12 deg.wedges respectively for the optimum splitter plate. length equal tothe base height. It is suggested that the observed drag reductionis due to lower -surface pressures associated with separated flow13; in the nose region.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Forward Splitter Plate;Total Drag;Base Pressure Wedge;Strouhal Number
    Subjects: AERONAUTICS > Avionics & Aircraft Instrumentation
    AERONAUTICS > Aerodynamics
    Division/Department: Experimental Aerodynamics Division, Experimental Aerodynamics Division
    Depositing User: Mr. N A
    Date Deposited: 04 May 2006
    Last Modified: 24 May 2010 09:41
    URI: http://nal-ir.nal.res.in/id/eprint/1279

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