Large-scale coherent structures in the atmosphere over a flat terrain

被引：4

作者：

Alcayaga, Leonardo ^{[1
]}

Larsen, Gunner Chr ^{[1
]}

Kelly, Mark ^{[1
]}

Mann, Jakob ^{[1
]}

机构：

[1] DTU Wind Energy, Frederiksborgvej 399, DK-4000 Roskilde, Denmark

来源：

SCIENCE OF MAKING TORQUE FROM WIND (TORQUE 2020), PTS 1-5 | 2020年 / 1618卷

关键词：

LONG;

D O I：

10.1088/1742-6596/1618/6/062030

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Large-scale coherent motions in the atmospheric boundary layer are investigated from field measurements made with two scanning wind lidars over a two-dimensional domain covering approximately 50 km(2). The size, isotropy and two-point statistics of the coherent structures, show their influence on wind field homogeneity and local conditions that wind turbines might experience within a wind farm. For neutral atmospheric stability and high wind conditions, most of these structures are observed to be narrow streaks of low streamwise momentum having positive vertical velocity component (ejections), extending several kilometers. The results shown here are consistent with numerical simulations of atmospheric flows under similar conditions, and scale experiments made in laboratories.

引用

页数：10

共 20 条

[1] Hairpin vortex organization in wall turbulence [J].

Adrian, Ronald J. .

PHYSICS OF FLUIDS, 2007, 19 (04)

[2]

Alcayaga L, 2020, ATMOS MEAS TECH DISC, V2020, P1

[3]

[Anonymous], 2015, Remote Sensing for Wind Energy, no. 0084 (EN) in DTU Wind Energy E, DTU Wind Energy, Denmark

[4] Large-Eddy Simulation of Very-Large-Scale Motions in the Neutrally Stratified Atmospheric Boundary Layer [J].

Fang, Jiannong ;

Porte-Agel, Fernando .

BOUNDARY-LAYER METEOROLOGY, 2015, 155 (03) :397-416

[5] COHERENT STRUCTURES - REALITY AND MYTH [J].

HUSSAIN, AKMF .

PHYSICS OF FLUIDS, 1983, 26 (10) :2816-2850

[6] Evidence of very long meandering features in the logarithmic region of turbulent boundary layers [J].

Hutchins, N. ;

Marusic, Ivan .

JOURNAL OF FLUID MECHANICS, 2007, 579 :1-28

[7] Towards Reconciling the Large-Scale Structure of Turbulent Boundary Layers in the Atmosphere and Laboratory [J].

Hutchins, Nicholas ;

Chauhan, Kapil ;

Marusic, Ivan ;

Monty, Jason ;

Klewicki, Joseph .

BOUNDARY-LAYER METEOROLOGY, 2012, 145 (02) :273-306

[8] New European Wind Atlas: The Osterild balconies experiment [J].

Karagali, Ioanna ;

Mann, Jakob ;

Dellwik, Ebba ;

Vasiljevic, Nikola .

SCIENCE OF MAKING TORQUE FROM WIND (TORQUE 2018), 2018, 1037

[9] Long-Term Mean Wind Profiles Based on Similarity Theory [J].

Kelly, Mark ;

Gryning, Sven-Erik .

BOUNDARY-LAYER METEOROLOGY, 2010, 136 (03) :377-390

[10] Wake meandering: A pragmatic approach [J].

Larsen, Gunner C. ;

Madsen, Helge Aa. ;

Thomsen, Kenneth ;

Larsen, Torben J. .

WIND ENERGY, 2008, 11 (04) :377-395

← 1 2 →