A spectral model of stably stratified surface-layer turbulence

Wake Conference 2015

Segalini, A.^1 ; Arnqvist, J.^2 ; Carlén, I.^3 ; Bergström, H.^2 ; Alfredsson, P.H.^1

Linné FLOW Centre, KTH Mechanics, Osquars Backe 18, Stockholm

10044, Sweden^1

Dept. Earth Sc., Uppsala University, Villavagen 16, Uppsala

75236, Sweden^2

TG Teknikgruppen AB, Kemistvägen 6, Täby

18379, Sweden^3

关键词: Energy applications;    Field measurement;    Rapid distortion theory;    Region of interest;    Spectral modeling;    Stratified flows;    Surface layer turbulence;    Velocity spectrum;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/625/1/012003/pdf
DOI  :  10.1088/1742-6596/625/1/012003

来源: IOP

【 摘 要 】

A new model to determine the spectral velocity tensor in a stably stratified flow is proposed. This model is complementary to the Mann model as it solves the stratified inviscid Rapid Distortion Theory equations analytically, allowing for the determination of the single and two-point velocity spectra as well as the temperature-velocity cross-spectra. The model has been here calibrated and validated against field measurements conducted over a forested area with measurements up to 140 m, therefore covering a region of interest for wind-energy applications.