Experiments were conducted to determine the drag coefficient C(D) of the tripwire and the approximate location of boundary layer flow transition. The investigation was performed with a simplified model of a circular cylinder placed on or near a flat plate. The experimental conditions were those typical of ship-model appendage drag experiments. One of the purpose was to obtain a formula for CD when there is a gap between the cylinder and the flat plate. An example of the drag prediction of an appendage, modeled as a flat plate, is given based on the new C(D) and the prediction method recommended here. A comparison with the result obtained using the prediction method currently in use at DTNSRDC is made. The results indicate that both the effect of a gap, if it exists, on the tripwire drag and the effect of the presence of the tripwire on the turbulent skin friction must be considered.


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    Title :

    Drag of a circular cylinder on or near a fiat plate appropriate for ship-model turbulence stimulators


    Additional title:

    Reibungswiderstand eines kreisrunden Zylinders auf oder nahe einer flachen Platte als Grundlage fuer die Simulierung von Turbulenzen mittels eines Schiffsmodells


    Contributors:

    Published in:

    Publication date :

    1983


    Size :

    66 Seiten


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English




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