大气边界层的模拟是风电场风能资源评估的核心环节。然而,现有大气边界层模拟研究中广泛存在对实际气象因素考虑欠缺,从而导致模拟准确性不足的问题。为此,该文结合实际测风数据与开源计算流体力学软件开发了一套风电场大气边界层模拟方法。该方法通过对测风数据的分析处理,将地表粗糙度以及大气稳定度这两种关键因素纳入大气边界层的模拟之中,使其能更加贴近实际地模拟边界层内的流场状态。使用该方法在一个真实案例下进行模拟,并与测风塔实测数据进行对比以验证开发方法的可靠性。结果表明,开发方法在不同的大气稳定度下的模拟结果与实测数据吻合程度较高,相比于现有商业软件WT的计算精度有较大幅度的提升,具有一定的工程实用价值。
Abstract
Simulation of the atmospheric boundary layer is the key of wind resource assessment. However, there is a widespread lack of consideration of actual meteorological factors in the existing atmospheric boundary layer simulation research, which leads to the problem of insufficient accuracy. To this end, this paper develops a set of atmospheric boundary layer simulation methods for wind farms by combining actual wind measurement data and open-source computational fluid dynamics software. By analyzing and processing wind measurement data, the method incorporates two key factors, surface roughness and atmospheric stability, into the simulation of the atmospheric boundary layer, so that it can simulate the flow field in the bound-ary layer more realistically. The method is used to simulate a real case and compare it with the measured data of the wind tower to verify the reliability of the developed method. The results show that the simulation results of the developed method under different atmospheric stability levels are in good agreement with the measured data. Compared with the existing commercial software, the calculation accuracy is greatly improved, and it has certain engineering practical value.
关键词
风电场 /
大气边界层 /
数值模拟 /
测风塔 /
地表粗糙度 /
大气稳定度
Key words
wind farm /
atmospheric boundary layer /
numerical simulation /
wind tower /
surface roughness /
atmospheric stability
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参考文献
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基金
中国长江三峡集团有限公司科研项目（202103506）
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