气候变化领域集成服务门户(CCPortal): Characterizing wind gusts in complex terrain

CCPortal

DOI	10.5194/acp-19-3797-2019
	Characterizing wind gusts in complex terrain
	Letson F.; Barthelmie R.J.; Hu W.; Pryor S.C.
发表日期	2019
ISSN	16807316
起始页码	3797
结束页码	3819
卷号	19 期号:6
英文摘要	Wind gusts are a key driver of aerodynamic loading, especially for tall structures such a bridges and wind turbines. However, gust characteristics in complex terrain are not well understood and common approximations used to describe wind gust behavior may not be appropriate at heights relevant to wind turbines and other structures. Data collected in the Perdigão experiment are analyzed herein to provide a foundation for improved wind gust characterization and process-level understanding of flow intermittency in complex terrain. High-resolution observations from sonic anemometers and vertically pointing Doppler lidars are used to conduct a detailed study of gust characteristics with a specific focus on the parent distributions of nine gust parameters (that describe velocity, time, and length scales), their joint distributions, height variation, and coherence in the vertical and horizontal planes. Best-fit distributional forms for varying gust properties show good agreement with those from previous experiments in moderately complex terrain but generate nonconservative estimates of the gust properties that are of key importance to structural loading. Probability distributions of gust magnitude derived from vertically pointing Doppler lidars exhibit good agreement with estimates from sonic anemometers despite differences arising from volumetric averaging and the terrain complexity. Wind speed coherence functions during gusty periods (which are important to structural wind loading) are similar to less complex sites for small vertical displacements (10 to 40m), but do not exhibit an exponential form for larger horizontal displacements (800 to 1500m). © 2019 Author(s).
语种	英语
scopus关键词	anemometer; boundary layer; complex terrain; displacement; Doppler lidar; magnitude; wind velocity
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144546
作者单位	Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States; Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, United States
推荐引用方式 GB/T 7714	Letson F.,Barthelmie R.J.,Hu W.,et al. Characterizing wind gusts in complex terrain[J],2019,19(6).
APA	Letson F.,Barthelmie R.J.,Hu W.,&Pryor S.C..(2019).Characterizing wind gusts in complex terrain.Atmospheric Chemistry and Physics,19(6).
MLA	Letson F.,et al."Characterizing wind gusts in complex terrain".Atmospheric Chemistry and Physics 19.6(2019).