Construction and Testing of Coatings for Drag Reduction

Construction and Testing of Coatings for Drag Reduction
Author: F. W. BOGGS
Publisher:
Total Pages: 77
Release: 1962
Genre:
ISBN:

The construction and testing of selected compliant coatings for drag reduction are described. Included are the scaling relations, description of test bodies, types of coatings and methods of construction, testing procedures, the phenomenon of static divergence, qualitative analysis, and conclusions. (Author).

Turbulent Drag Reduction Using Compliant Coatings

Turbulent Drag Reduction Using Compliant Coatings
Author:
Publisher:
Total Pages: 0
Release: 2004
Genre:
ISBN:

The skin-friction drag of compliant coatings was measured using an axi-symmetric test model in a water tunnel for flow speed up to 4.5 m/s at the Reynolds number of 2.3 million. There were measurable drag reductions for up to 3% from three out of five compliant coatings tested. Only one coating showed a small drag increase, and the other had no change in drag. For all the tests, the 95% confidence level in measured drag reduction was 1% for flow velocities between 2.5 and 4.5 m/s. The error analysis suggested that the uncertainty was progressively increased with a reduction in flow velocity.

Design, Manufacture, and Testing of Compliant Coatings for Reduction of Turbulent Drag

Design, Manufacture, and Testing of Compliant Coatings for Reduction of Turbulent Drag
Author: S. C. Dickinson
Publisher:
Total Pages: 48
Release: 1984
Genre:
ISBN:

The drag of three compliant coatings was measured in the DTNSRDC 36-inch water tunnel. Two coatings were of the 'Kramer' type, while the other one was a closed-cell neoprene foam. The drag of the 2.032-m (80-in.) long and 0.737-m (29-in.) wide compliant coatings was compared to the drag of a smooth, solid reference plate.