供冷模式下十字柱贴附通风流场特征及通风效果数值模拟研究
Numerical Investigation on the Flow Field Characteristics and Ventilation Effectiveness of Cross-shaped Column Attachment Ventilation Under Cooling Mode
常铸 1尹海国 1霍耀坤 1李洋 1王佳丽 1姬黛娜1
作者信息
- 1. 西安建筑科技大学建筑设备科学与工程学院,西安 710055
- 折叠
摘要
柱面贴附通风是1种新型的气流组织形式,柱体结构特征会直接影响其气流分布.本文分别以方柱和十字柱作为规则结构柱与异形结构柱的代表,采用数值模拟的方法研究了十字柱贴附通风模式下室内气流的分布,并与传统的方柱贴附通风模式进行了对比.结果表明:在供冷模式下采用十字柱贴附通风是可行的,十字柱内凹面的近壁速度(距柱面0.1 m处)比十字柱外凸面、方柱面高0.4 m/s,有助于将更多能量送入工作区.由于十字柱内凹面可以强化柱角附近气流的撞击作用,在工作区,十字柱贴附模式的ADPI比方柱贴附模式均略高(约10％).但有些工况下十字柱贴附模式ADPI达标(＞80％),而方柱贴附模式不达标.这表明,与方柱贴附模式相比,十字柱贴附送风模式整体舒适性更高.
Abstract
Column attachment ventilation(CAV)is a new type of air distribution,and the structure characteristics of the column will directly affect its air distribution.In this paper,the square column and cross-shaped column were taken as the representatives of a regular structural column and a special-shaped structural column,respectively.And numerical simulation was made to study the indoor airflow distribution under cross-shaped column attachment ventilation(CS-CAV),and compare the findings with the traditional square column attachment ventilation(S-CAV).The results showed that it is feasible to use the CS-CAV in cooling mode.The near-wall velocity of the inner concave surface of the cross-shaped column(0.1 m away from the column surface)is 0.4 m/s higher than that of the outer convex surface of the cross-shaped column and square column surface,which helps to send more energy into the occupied zone in cooling mode.Since the inner concave surface of the cross-shaped column can strengthen the impact of the airflow near the column corner.In the occupied zone,the ADPI of the CS-CAV is slightly higher(about 10％)than that of S-CAV.However,under some working conditions,the ADPI of CS-CAV meets the standard(＞80％),while that of S-CAV does not.These indicate that CS-CAV has a higher overall comfort compared with S-CAV.
关键词
柱面贴附通风/异形柱/气流组织/通风效果Key words
column attachment ventilation/special-shaped column/air distribution/ventilation effectiveness引用本文复制引用
基金项目
国家自然科学基金青年项目(51408477)
陕西省自然科学基础研究计划项目(2021JM-361)
出版年
2024
NETL
NSTL
万方数据