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- W1657973485 abstract "A simplified method is presented for estimating onsite turbulence variance within the wind turbine layer for horizontal wind speed. The method is based principally on estimating the probability distribution of wind speed and assigning a variance to each mean wind speed based on surface roughness estimates. The model is not proposed as an alternative to onsite measurement and analysis, but rather as an adjunct to such a program. A revision of the Kaimal neutral u-component spectrum is suggested to apply to the mix of the stabilities occurring during operational winds. Values of integral length scale calculated from data analysis are shown to contradict the length scale model implicit in turbulence power spectra. Also, these calculated values are shown to be extremely sensitive to the length of the time series and the detrending method used. The analysis and modeling are extended to the rotational frame of reference for a horizontal-axis wind turbine by modeling the ratios of harmonic spike variances (1P, 2P, etc.) in the rotational spectrum to the Eulerian turbulence variance. 15 refs., 11 figs., 3 tabs." @default.
- W1657973485 created "2016-06-24" @default.
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- W1657973485 date "1988-11-01" @default.
- W1657973485 modified "2023-09-24" @default.
- W1657973485 title "Estimation of turbulence level and scale for wind turbine applications" @default.
- W1657973485 doi "https://doi.org/10.2172/6557884" @default.
- W1657973485 hasPublicationYear "1988" @default.
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