Accession Number:

ADA126155

Title:

The Drag of a Circular Cylinder on or Near a Flat Plate Appropriate for Ship-Model Turbulence Stimulators.

Descriptive Note:

Departmental rept.,

Corporate Author:

DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD SHIP PERFORMANCE DEPT

Personal Author(s):

Report Date:

1983-02-01

Pagination or Media Count:

66.0

Abstract:

Experiments were conducted to determine the drag coefficient CD 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 purposes 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 CD 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.

Subject Categories:

  • Numerical Mathematics
  • Marine Engineering
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE