典型方腔夏季工况风口布置与送风方式模拟优化分析  

Simulation and Optimization Analysis of Diffuser Layout and Air Supply Mode of a Typical Cavity under Summer Conditions

作　　者：林栋炫 LIN Dong-xuan(Xiamen Ocean Vocational College,Xiamen 361102,Fjian,China)

机构地区：[1]厦门海洋职业技术学院,厦门361102

出　　处：《建筑节能（中英文）》2022年第7期95-100,共6页Building Energy Efficiency

摘　　要：为优化夏季工况风口布置,基于计算流体动力学理论采用Yang-Shih k-ε湍流模型对典型方腔内的气流组织进行模拟计算并验证模拟准确性,采用换气效率和温度效率两项指标对“对侧上部水平送风下部水平回风”“对侧上部垂直送风下部水平回风”“同侧上部水平送风下部水平回风”3种不同风口布置方案进行了对比评估。结果表明:1) Yang-Shih k-ε湍流模型对室内非等温射流通风流场和温度场具有较好的预测能力;2)风口布置方案直接影响到贴附射流的形式进而对流场分布产生显著影响;3)夏季工况下,同侧上部水平送风下部水平回风方案的换气效率最高,温度效率与对侧上部垂直送风下部水平回风相近,且高于对侧上部水平送风下部水平回风。综合考虑换气效率和温度效率两项指标,同侧上部水平送风下部水平回风的通风方式为夏季工况风口布置最佳方案。In order to optimize the diffuser layout under summer conditions, the Yang-Shih k-ε turbulence model was adopted to conduct a numerical simulation of the airflow organization in a typical square cavity, and the accuracy of simulation was verified. And three different ventilation scenarios were compared based on the two indicators of ventilation efficiency and temperature efficiency. The three different ventilation scenarios were up-horizontal-supply and down-horizontal-return on the opposite side, up-vertical-supply and down-horizontal-return on the opposite side, up-horizontal-supply and down-horizontal-return on the same side. The results is given as follows: 1)the Yang-Shih k-ε turbulence model has a good prediction ability for the non-isothermal jet ventilation flow field and temperature field;2)the diffuser layout directly affects the form of attached jet, which has a significant influence on the flow field distribution;3)under summer conditions, the ventilation scenario up-horizontal-supply and down-horizontal-return on the same side is the highest for ventilation efficiency, and its temperature efficiency is similar to that of the up-vertical-supply and down-horizontal-return on the opposite side and better than that of the up-horizontal-supply and down-horizontal-return on the opposite side. Combined the ventilation efficiency and temperature efficiency, the ventilation scheme of up-horizontal-supply and down-horizontal-return on the same side is the best ventilation scenario under summer conditions.

关 键 词：气流组织 室内通风 计算流体动力学 风口布置 

分 类 号：TU111[建筑科学—建筑理论]