基于CFD的各式窗孔应用流量系数分析
Analysis of applied discharge coefficients of different types of ventilation devices based on CFD
摘要：
在建筑通风模拟应用中，若进行CFD模拟，常常无法细化至建筑的每一个窗孔，否则将耗费大量的计算成本；若进行系统模拟，需要对不同的窗孔设置仿真模型和相关性能参数。定义更适合工程实用的应用流量系数，针对系统模拟软件中流量系数的模型，给出各式窗孔精确的应用流量系数与窗孔结构参数的多项式拟合结果。该结果为通风模拟提供理论依据并起到了数据储备的作用。
Abstract：
When applying simulation to building ventilation, the CFD calculation can rarely cover every detail on every ventilation device, otherwise would require enormous calculating resource. On the other hand, if a systemic analysis is applied, specific models and relative performance parameters need to be set on each ventilation device. Defines the applied discharge coefficient for practical engineering projects, regarding the discharge coefficient model in systemic simulation software. The results show that the relationship between the discharge coefficient and the geometric parameters of various ventilation devices based on polynomial fitting with relatively high accuracy. The results provide a thorough study of natural ventilation with theoretical basis and data support.
Keywords:discharge coefficient, computational fluid dynamics, natural ventilation, venetian blind, polynomial fitting