方形散流器喉部对送风气流均匀性的影响分析  

Analysis of the Effect of Square Diffuser Throat on the Uniformity of Air Flow

作　　者：王勇[1,2] 苏凯[3] 戴希磊[1,2] 周武洋 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]重庆大学低碳绿色建筑国际联合研究中心,重庆400045 [3]中国建筑西南设计研究院有限公司设计十院(重庆院),重庆400045

出　　处：《湖南大学学报（自然科学版）》2015年第5期126-133,共8页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51178482);高等学校学科创新引智计划资助项目(B13041)~~

摘　　要：由于水平风管与方型散流器接管不当,导致气流进入散流器喉部扰动较大,从而使散流器四面出风不均匀,影响了室内气流的分布.以散流器四面出风的均匀性指标为研究对象,以数值计算为研究手段,结合实际工程测试数据,对不同风速下改进型散流器的气流分布进行了计算分析,提出了增加散流器喉部导流装置的高度以及在喉部设置角度可调的导流叶片的两种技术措施,并建立了相应的测试平台.测试结果表明,改进后的导流叶片更易平衡垂直于送风方向散流器出口两侧的送风量,从而较易保证散流器四面出风的均匀性,显著提高散流器整体的送风均匀性,较大地改善了室内舒适度.Due to the horizontal air duct and the improperly connected square diffuser, the airflow entering the throat of the diffuser causes large disturbance. Consequently, it makes the diffuser＇s air supply uneven from all sides, and eventually affects the distribution of indoor air. To study the effect of the throat structure on the uniformity of air flow, this paper, based on the computational fluid dynamic （CFD）, combined practical engineering tests, calculated and analyzed the air distribution of improved diffuser under different wind speeds and proposed an improved scheme of diffuser, namely, increasing the height of the diffuser throat and setting guide vanes with adjustable angles in the throat. And an improved diffuser test platform was established to get the contrast test data through experiments and tests. The test data show that the improved guide vanes can more evenly balance the air supply of the diffuser on both sides of the perpendicular to the flow direction, so that the diffuser can easily ensure the uniformity of the wind on allsides, and the uniformity of air distribution increases significantly. As a result, the indoor comfort level is improved substantially.

关 键 词：方形散流器 喉部结构 数值计算 气流分布 

分 类 号：TU834.5[建筑科学—供热、供燃气、通风及空调工程]