中文摘要：

优化城市的街峡谷的布局完成最大的环境好处应该为现代的城市的街设计成为一个新想法并且计划。由使用二维的数字模拟从环境保护的一个观点发现优化的街峡谷的 Thispaper 目的与 k 当模特儿 - ε骚乱模型，结合数学优化方法。全部的污染物质集中在以内并且在特定的街峡谷的顶作为抑制条件作为峡谷的一个方面的客观功能，和高度被拿。A 线性地非改善了抑制可变公制的解答者被使用。下风在综合污染物质分散上造并且上风的造的高度的效果被学习完成城市的几何学的最有益的配置。为一个不均匀的街峡谷的布局的优化被获得。有大高度差别的电压降低的街峡谷通常是赞成岩山的一个好布局，这进一步被发现引出集中累积在街上峡谷。

英文摘要：

Optimizing the layout of the urban street canyon to achieve the maximum environmental benefits should become a new idea for modem urban street design and planning. This paper aims to find out the optimized street canyon from a viewpoint of environmental protection by using the two-dimensional numerical simulation model with the κ-ω turbulence model, coupling with the mathematical optimization method. The total pollutant concentration within and at top of the specific street canyons was taken as the objective function, and the height of one side of the canyon as the constrained condition. A nonlinearly improved constrained variable metric solver was used. The effect of the height of the leeward building and windward building on the integrated pollutant dispersion was studied to achieve the most beneficial configuration of the urban geometry. The optimization of layout for an asymmetrical street canyon was obtained. It is further found that the step-down street canyon with a large height difference is generally a good layout favoring to reduce the concentration accumulation in the street canyon.