基于多变量分析的滨海城市空间形态与中尺度风环境的耦合机制研究初探之研究意义、内容、目标和创新点

Study on the Coupling Mechanism of Urban Spatial form in Coastal City and Mesoscale Wind Environment Based on Multi-variable Analysis-Study Significance,Content,Targets and Innovation Points

针对滨海城市风环境变量的矛盾性、复杂性以及城市空间形态难以量化研究的问题,灵活运用多变量分析技术探索滨海城市空间形态与中尺度风环境系统相互融合的可行技术途径及耦合机制。梳理滨海城市空间形态的变化对风环境的影响机制,研究基于中尺度风环境模式嵌套城市边界层并结合城市下垫面能量平衡模式,以构建城市空间形态对城市风环境的响应策略,模拟分析不同情景下城市热岛、局地风和污染扩散的响应特征,并结合社会经济的发展需求,确定可行的城市空间形态方案。利用卫星遥感与地面监测相结合收集相关参量,由CFD模拟核算,经多变量分析得出结论后,通过大型风洞实验室模型验证。进一步研发可优化滨海城市风环境的空间形态引导系统软件。此研究将有助于通过空间引导对城市风环境的主动调节,为当前我国滨海城市高速发展引发的大气污染防治、台风防灾减灾、城市节能减排等热点研究问题提供参考,并响应政府建设新型智慧城市的号召。

This research is in view of the contradiction and complexity of the wind environment variables in coastal cities, and the difficulty of quantifying the urban spatial form. We try to achieve technical approach and coupling study to combine the coastal urban spatial morphology with the mesoscale wind environment system, and sum up the effect mechanism of coastal ubran spatial morphology to wind environment. Based on combination of the mesoscale wind environment model of the urban boundary layer and the energy balance model of the urban surface, the response strategy of the urban spatial morphology to the urban wind environment is constructed to analyze characteristics of the urban heat island, local wind and pollution, and the viable urban spatial form program i determined by the socio-economic development needs. The technical means is collecting relevant parameters by the combination of satellite remote sensing and ground monitoring. The CFD technology is used to simulate the calculation. The conclusion is obtained by the multivariate analysis and then verified by the large wind tunnel laboratory model. The further research is to develop the booting system software to optimize the spatial morphology of coastal urban wind environment. This study will be conductive to actively adjust the wind environment by the space guidance, provide reference for hot issues, such as prevention of air pollution, Typhoon disaster prevention and energy conservation, caused by the rapid urban development and respond to the call of the government to build a ＂smart city＂.