Anemometer Height in Froude Scaling of Wind Stress

by Jin Wu, (M.ASCE), Principal Res. Sci.; HYDRONAUTICS, Inc., Laurel, MD,


Serial Information: Journal of the Waterways, Harbors and Coastal Engineering Division, 1971, Vol. 97, Issue 1, Pg. 131-137


Document Type: Journal Paper

Abstract: Extending previously proposed Froude scaling of wind stress coefficients, the paper suggests the appropriate anemometer heights for different wind fetches, and proposes a procedure of obtaining the wind stress by a single wind velocity measurement at this suggested anemometer height. The procedure consists of first estimating the fetch Renynolds number and then obtaining a tentative anemometer height from a prepared figure. Setting the anemometer at this height, an accurate wind velocity is measured; from this measurement and knowledge of the wind fetch, a corrected anemometer height can then be determined. Having the wind velocity measured at this final anemometer height, the wind stress coefficient can be obtained from another prepared figure.

Subject Headings: Wind forces | Measuring instruments | Wind speed | Froude number | Fouling

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