基于SRTM资料的小海岛CFD计算模型构建——以东澳岛为例

提出了一种利用SRTM资料构建海岛CFD计算模型的技术方法,并以珠江口的东澳岛为对象,进行了模型构建试验及边界层风场的数值模拟试验.实验结果表明,SRTM资料作为开源的资料,可有效地解析空间尺度在1 km以内数量级的海岛地形,并可以此为基础构建用于CFD模拟的计算模型,真实地刻画出岛屿的地形.利用计算模型进行的模拟试验表明,岛屿地形对风场的影响明显,且这种影响可以被计算模型有效地描述.所提出的技术未来在海岛风资源评估、风电场选址、污染扩散等领域有望发挥作用.

Construction of CFD Model for Wind Field Simulation over Small Island Based on SRTM Data:Taking Dong'ao Island as an Example

A technical method of establishing CFD simulation model for island based on SRTM (Shuttle Radar Topography Mission) data was proposed. Taking Dong''ao island in the Pearl River Estuary as an example, the simulation model was established, and the boundary layer wind field was experimentally simulated by using the model. The results showed that as an open source dataset, SRTM data can effectively resolve the complex terrain of the island with a spatial scale less than 1km, and can be used to establish a computational model for CFD simulation to describe the island terrain in details. The simulation experiment using the simulation model indicated that the influence of island terrain on wind field was obvious, which can be effectively described by the simulation model. The technical method proposed in the current study was expected to play an important role in the fields of island wind resource assessment, wind farm site selection, pollution diffusion, and so on.