建筑节能
建築節能
건축절능
CONSTRUCTION CONSERVES ENERGY
2014年
5期
8-10
,共3页
建筑中庭%自然通风%模拟%流场模型
建築中庭%自然通風%模擬%流場模型
건축중정%자연통풍%모의%류장모형
Building Atrium%Natural Ventilation%Simulation%Flow Model
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。
採用FLUENT軟件建立典型的建築中庭CFD自然通風模型，分彆採用RNG K-E流場模型和K-E流場模型進行計算，通過收斂速度、速度矢量、中心速度三箇因素的對比，分析兩種流場模型對模擬的影響。計算結果錶明，RNG K-E模型比K-E模型顯著提高瞭收斂速度，進而提高瞭計算速度；兩種模型下的速度矢量和中心風速有較大差彆，RNG K-E模型比K-E模型計算結果更連續，更接近實際工況。
채용FLUENT연건건립전형적건축중정CFD자연통풍모형，분별채용RNG K-E류장모형화K-E류장모형진행계산，통과수렴속도、속도시량、중심속도삼개인소적대비，분석량충류장모형대모의적영향。계산결과표명，RNG K-E모형비K-E모형현저제고료수렴속도，진이제고료계산속도；량충모형하적속도시량화중심풍속유교대차별，RNG K-E모형비K-E모형계산결과경련속，경접근실제공황。
The FLUENT software was used to establish the CFD model for natural ventilation in atri-um, 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 im-proved 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.
