Proposed technique for reduction of friction drag on hydrodynamic body involves use of grooves and combinations of surfactants to control motion of layer on surface of such body. Surface contains many rows of side-by-side, evenly spaced, longitudinal grooves. Dimensions of grooves and sharpnesses of tips in specific case depends on conditions of flow about vessel. Requires much less air than does microbubble-injection method.
Reducing Water/Hull Drag By Injecting Air Into Grooves
NASA Tech Briefs ; 15 , 12
1991-12-01
Miscellaneous
No indication
English
NTRS | 1980
|Longitudinal grooves for bluff body drag reduction
NTRS | 1981
|Longitudinal grooves for bluff body drag reduction
AIAA | 1981
|