Abstract
We present a preliminary evaluation of shelter models of different degrees of complexity using full-scale lidar measurements of the shelter on a vertical plane behind and orthogonal to a fence. Model results accounting for the distribution of the relative wind direction within the observed direction interval are in better agreement with the observations than those that correspond to the simulation at the center of the direction interval, particularly in the far-wake region, for six vertical levels up to two fence heights. Generally, the CFD results are in better agreement with the observations than those from two engineering-like obstacle models but the latter two follow well the behavior of the observations in the far-wake region.
Highlights
Our main interest in this study is to evaluate a number of shelter models that are used when performing wind-resource assessment studies
Model results accounting for the distribution of the relative wind direction within the observed direction interval are in better agreement with the observations than those that correspond to the simulation at the center of the direction interval, in the far-wake region, for six vertical levels up to two fence heights
We evaluate three models using the shelter observations of case II; a computational fluid dynamics (CFD) model solving the Reynolds Averaged Navier-Stokes (RANS) equations, and two engineering-like obstacle models: the Wind Atlas Analysis and Application Program (WAsP) shelter model and WEMOD
Summary
Our main interest in this study is to evaluate a number of shelter models that are used when performing wind-resource assessment studies. The shelter behind obstacles is challenging to model as the flow characteristics can be rather complex. The experiment and the measurements are described in detail in ref. The result of the experiment is a comprehensive dataset of observations (namely seven benchmark cases) of the shelter on a vertical plane behind and orthogonal to a fence and of the inflow conditions that were derived from measurements of two sonic anemometers mounted on a nearby meteorological mast. The main purpose of the experiment was to serve as a benchmark for the evaluation of flow models because full-scale shelter observations are nearly non-existent. Comparison of flow model simulations of windbreaks with measurements is provided in ref. Comparison of flow model simulations of windbreaks with measurements is provided in ref. [6]
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