Development Of Digital Particle Image Velocimetry

Ramesh, G and Madhavan, KT (2001) Development Of Digital Particle Image Velocimetry. Technical Report. NAL, Bangalore.

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    Abstract

    Development Of A Digital PIV System At NAL And Its Application In The Near Field Of A Small Aspect Ratio Elliptic Jet,For Validation Of PIV Data Has Been Reported. The Development Work Included The Integration Of Sub-Systems And Development Of Processing Algorithms For PIV Data. Program For Vector Extraction Using Cross Correlation And Pattern Matching Technique Were Carried Out. DPIV Studies In Small Aspect Ratio Elliptic Jet Was Carried Out With The Twin Objectives Viz. Validation Of DPIV Measurements And To Study Near Field Of Elliptic Jet Flow Towards Better Understanding Of Some Aspects Of Flow Development. The Measurement Apart From Instantaneous Velocity Fields Includes The Mean, Turbulence Intensities And Reynolds Stress In The Major And Minor Planes At Moderate Reynolds Number. The Comparison With Conventional Measurements Is Presented Wherever Possible And The Deviations Are Interpreted. The Jet Growth In The Major And Minor Planes Has Been Found To Be Different And The Phenomenon Of Axis Switching Is Found To Occur At About Five Equivalent Diameters Of The Jet.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: DPIV; pulsed laser; light sheet; cross correlation; elliptic jet; axis-switch
    Subjects: ASTRONAUTICS > Astronautics (General)
    Division/Department: Experimental Aerodynamics Division, Experimental Aerodynamics Division
    Depositing User: M/S ICAST NAL
    Date Deposited: 23 Aug 2012 13:34
    Last Modified: 23 Aug 2012 13:34
    URI: http://nal-ir.nal.res.in/id/eprint/10789

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