Accession Number : ADP001581

Title :   Wind Variability in the Boundary Layer and Its Association with Turbulence, Red and White Noise,


Personal Author(s) : Essenwanger,Oskar M.

Report Date : JUN 1983

Pagination or Media Count : 14

Abstract : In the boundary layer, wind fluctuations during short time intervals in the magnitude of seconds are commonly interpreted in terms of turbulence theory. According to Kolmogorov, Obukhov and Corrsin, this requires a -5/3 slope in a diagram of the power spectrum versus the wave length in double logarithmic coordinates. The turbulence characteristics fade with averaging time of the wind measurements. Investigations of one- and six-second tower measurements at Redstone Arsenal and Otis Air Force Base revealed, however, that these small scale fluctuations more frequently show associations with white or red noise rather than turbulence characteristics in the spectrum. It will be illustrated that the turbulence slope is a special case of red noise. (Author)

Descriptors :   *Boundary layer, *Wind, *Variations, Measurement, Turbulence, White noise, Time intervals, Short range(Time), Power spectra, Correlation, Autocorrelation

Distribution Statement : APPROVED FOR PUBLIC RELEASE