简要交流:关于低空喷气机的定义

IF 3.6 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Wind Energy Science Pub Date : 2023-11-08 DOI:10.5194/wes-8-1651-2023

Christoffer Hallgren, Jeanie A. Aird, Stefan Ivanell, Heiner Körnich, Rebecca J. Barthelmie, Sara C. Pryor, Erik Sahlée

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引用次数: 0

摘要

摘要低空射流(llj)是非对数风速分布影响风力涡轮机发电、尾流恢复和结构/气动载荷的例子。然而，对于应该采用哪种定义来识别喷气机，目前还没有达成一致意见。在这项研究中，我们认为剪切定义比衰减定义更与风能相关。通过欧洲中期天气预报中心(ECMWF)的第五代再分析(ERA5) LLJ气候学的发展，对六个站点的切变定义进行了论证和验证。llj的识别及其形态、频率和强度严重依赖于(i)提取llj的数据的垂直窗口和(ii)所采用的定义。

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Brief communication: On the definition of the low-level jet

Abstract. Low-level jets (LLJs) are examples of non-logarithmic wind speed profiles affecting wind turbine power production, wake recovery, and structural/aerodynamic loading. However, there is no consensus regarding which definition should be applied for jet identification. In this study we argue that a shear definition is more relevant to wind energy than a falloff definition. The shear definition is demonstrated and validated through the development of a European Centre for Medium-Range Weather Forecasts (ECMWF) fifth-generation reanalysis (ERA5) LLJ climatology for six sites. Identification of LLJs and their morphology, frequency, and intensity is critically dependent on the (i) vertical window of data from which LLJs are extracted and (ii) the definition employed.

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来源期刊

Wind Energy Science GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY-

CiteScore

6.90

自引率

27.50%

发文量

115

审稿时长

28 weeks