CFD方法在街巷气象场模拟和预测中的应用

为开发建立米级分辨率的城市街巷气象场模拟预测方案，以PHOENICS为例介绍了计算流体力学（CFD）方法的原理，讨论了该方法应用于街巷气象要素数值计算的可行性。提出了一种基于CFD模型与高分辨率数值天气预报模式嵌套的街渠气象场模拟预测方案，并对边界嵌套问题作了多种敏感性分析，表明嵌套对街渠气象场计算具有必要性和可行性；另外，还讨论了分辨率对计算结果和计算耗时的影响；最后，用实例介绍了本方案的应用，并讨论了本方法的应用前景。

Application of CFD Method to Simulation and Prediction of Meteorological Fields for Street Lane

Taking PHOENICS as example, the principles of computational fluid dynamics (CFD) is described. The feasibility of applying the CFD method to numerical calculation of meteorological elements for street lane is discussed. A scheme for simulating and predicting meteorological fields in street lane is proposed, which is based on the nested CFD model into high-resolution numerical weather prediction model. A number of sensitivity analyses are run for the nesting problems at the boundary. It shows that nesting treatment is necessary and feasible in the calculation of meteorological fields. In addition, the effect of resolution on the results and duration of calculations is also discussed. In the final section, real cases are used to illustrate the application of the proposed scheme and the potential usefulness of the method.