Drag reduction characteristics of small amplitude rigid surface wavesThe possibility of reducing drag by using rigid, wavy surfaces is investigated both analytically and experimentally. Although pressure drag for rigid sine-wave surfaces can be predicted empirically, viscous drag for even shallow waves was poorly predicted by state-of-the-art turbulent boundary layer calculation procedures. Calculations for the effects of geometric and fluid variables on total wave drag are presented under the philosophy that trends will be nearly correct even though levels are probably incorrect. Experiments by the present authors indicate that a total drag reduction with wavy walls is possible.
Document ID
19810042105
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Cary, A. M., Jr. (NASA Langley Research Center Hampton, VA, United States)
Weinstein, L. M. (NASA Langley Research Center Hampton, VA, United States)
Bushnell, D. M. (NASA Langley Research Center High-Speed Aerodynamics Div., Hampton, Va., United States)