建筑中庭自然通风模拟中流场模型比选  

Comparison for Simulation of Natural Ventilation in Building Atrium Using Different Flow Models

作　　者：杨奇飞[1,2] 李志红[2] 熊湜 

机构地区：[1]珠海兴业绿色建筑科技有限公司,广东珠海519000 [2]华南理工大学建筑节能研究中心,广州510640

出　　处：《建筑节能》2014年第5期8-10,共3页BUILDING ENERGY EFFICIENCY

基　　金："十二五"国家科技支撑计划项目(2012BAA10B00)

摘　　要：采用FLUENT软件建立典型的建筑中庭CFD自然通风模型,分别采用RNG K-E流场模型和K-E流场模型进行计算,通过收敛速度、速度矢量、中心速度三个因素的对比,分析两种流场模型对模拟的影响。计算结果表明,RNG K-E模型比K-E模型显著提高了收敛速度,进而提高了计算速度;两种模型下的速度矢量和中心风速有较大差别,RNG K-E模型比K-E模型计算结果更连续,更接近实际工况。The FLUENT software was used to establish the CFD model for natural ventilation in atrium, calculating with RNG K-E model and the K-E model respectively. The effects of two flow models for simulation were compared by three factors, namely the convergence speed, velocity vector and velocity. The calculation results show that the RNG K-E model is better than K-E model. The calculation speed was improved significantly using RNG K-E model. The results also show that the velocity vector and the center wind speed are different using the two models. The results are more continuous using RNG K-E model than K-E model results. The RNG K-E model is closer to actual working condition than K-Emodel.

关 键 词：建筑中庭 自然通风 模拟 流场模型 

分 类 号：TU834.1[建筑科学—供热、供燃气、通风及空调工程]