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Drag of two-dimensional small-amplitude symmetric and asymmetric wavy walls in turbulent boundary layers

Author:
Lin, J. C.
Published:
Jun 1, 1984.
Physical Description:
1 electronic document
Additional Creators:
Balasubramanian, R. and Walsh, M. J.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary:
Included are results of an experimental investigation of low-speed turbulent flow over multiple two-dimensional transverse rigid wavy surfaces having a wavelength on the order of the boundary-layer thickness. Data include surface pressure and total drag measurements on symmetric and asymmetric wall waves under a low-speed turbulent boundary-layer flow. Several asymmetric wave configurations exhibited drag levels below the equivalent symmetric (sine) wave. The experimental results compare favorably with numerical predictions from a Reynolds-averaged Navier-Stokes spectral code. The reported results are of particular interest for the estimation of drag, the minimization of fabrication waviness effects, and the study of wind-wave interactions.
Other Subject(s):
Collection:
NASA Technical Reports Server (NTRS) Collection.
Note:
Document ID: 19840017876.
Accession ID: 84N25944.
L-15761.
NAS 1.60:2318.
NASA-TP-2318.
Terms of Use and Reproduction:
No Copyright.
View MARC record | catkey: 15707822