室内流场湍流模型对比研究  

A comparative study on turbulence models for indoor air flow field

作　　者：张盟盟 凡凤仙[1] 胡晓红[1] ZHANG Meng-meng;FAN Feng-xian;HU Xiao-hong(School of Energy and Power Engineering,University of Shanghai forScience and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《能源工程》2018年第2期52-59,共8页Energy Engineering

摘　　要：为探明不同湍流模型求解室内流场的适用性,基于计算流体力学软件Fluent和Airpak的零方程模型、室内零方程模型、标准k-ε模型、RNG k-ε模型和Realizable k-ε模型,对暖通空调领域三种典型室内流场(无障碍物时的等温强制对流、有障碍物时的等温强制对流、有内热源时的混合对流)开展数值模拟,并将数值模拟得到的风速分布与实测值进行对比分析。结果表明:基于Fluent的Realizable k-ε模型和基于Airpak的RNG k-ε模型能够准确预测三种典型室内流场的速度分布;室内零方程模型对于室内无障碍物时的等温强制对流预测结果较差,而对于有障碍物时的等温强制对流和有内热源时的混合对流,在计算精度要求不是特别高的工程计算中可以使用;零方程模型对三种典型室内流场的预测结果均较差,在室内流场特性研究中应避免使用。In order to explore the applicability of turbulence models in solving the indoor air flow field,the numerical simulations on three typical indoor air flow field,including isothermal forced convection without and with obstacle,and the mixed convection with an internal heat source in the area of heating,ventilation and air conditioning(HVAC)were performed.The zero-equation model,indoor zero-equation model,standard k-εmodel,RNG k-εmodel and realizable k-εmodel based on the computational fluid dynamics packages Fluent and Airpak were adopted.The air velocity distributions obtained from the numerical simulations were discussed by comparing with the experimentally measured data.The results showed that the Realizable k-εmodel based on Fluent and the RNG k-εmodel based on Airpak were capable of accurately predicting the velocity distributions of the three typical indoor air flow field.The predicting results on the isothermal forced convection without the obstacle using indoor zero-equation model based on Airpak were insufficient,while this model could be used for predicting the forced convection with an obstacle as well as the mixed convection with an internal heat source in engineering computations when the computational accuracy required was not very high.Moreover,the zero-equation model should be avoided using in the study of indoor air flow field due to its poor prediction for the typical air flow fields.

关 键 词：暖通空调(HVAC) 计算流体力学(CFD) 室内流场 湍流模型 数值模拟 

分 类 号：O355[理学—流体力学]