A Study on Coupled Simulation System of Heat and Airflow in Outdoor Space for The Computer Aided Design Tool

《热平衡模拟与数值模拟的耦合模拟》有望成为室外空间的计算机辅助设计工具。与现有的预测方法相比，该方法更强调能够对设计过程中给出的热辐射环境、空气温度、风场分布进行评估，从而进行及时预测。利用该耦合模拟方法，对马尼拉两个居住区的微气候进行了研究。通过与现有城区标准模型的对比，验证了热改善模型对室外空间热辐射环境和气流环境的改善效果，也验证了所提出的模拟方法作为室外空间计算机辅助设计工具的有效性。将热平衡仿真预测方法作为耦合仿真的主要程序之一，与3D-CAD系统相结合，使其易于输入复杂的外部形状，并可以在任意视点上评估表面温度的三维分布。本文将热平衡模拟应用于东京一个由5栋房屋和大树冠树组成的现有小住宅小区的热问题研究中，证实了热平衡模拟可以有效地评估室外空间设计差异所带来的热影响。

"A Coupled Simulation of Heat Balance Simulation and Numerical Simulation" is expected to be the computer aided design tool in outdoor space. Compared with existing prediction methods, this method places greater emphasis on its ability to make it possible to evaluate thermal radiant environment, air temperature, and wind distribution that are given to the timely prediction in design process. By the use of this coupled simulation method, the micro-climate of Metro Manira's two dwelling areas were studied. It was confirmed that the thermal improvement model was effective for the improvement of thermal radiant environment and airflow environment in outdoor space compared with the standard model of existing urban area, it was also confirmed that the proposed simulation method was effective as the computer aided design tool in outdoor space.The Prediction method of heat balance simulation that is one of main programs of coupled simulation was combined with 3D-CAD system that makes it easily to input the complicated external shape and also make it possible to evaluate the 3-D distribution of surface temperature at any view points. The heat balance simulation was used on trial for thermal problem study of an existing small residence area in Tokyo that is composed of five houses and big crown trees, it was confirmed that the heat balance simulation was so effective as to evaluate the thermal influences that were given by the differences of outdoor space design.