The drag of a circular cylinder on or near a flat plat appropriate for ship-model turbulence stimulators
Abstract
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 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 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.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- February 1983
- Bibcode:
- 1983STIN...8329638S
- Keywords:
-
- Boundary Layer Flow;
- Boundary Layer Transition;
- Drag Coefficients;
- Ship Hulls;
- Cylindrical Bodies;
- Plates;
- Position (Location);
- Predictions;
- Skin Friction;
- Turbulent Boundary Layer;
- Fluid Mechanics and Heat Transfer