渗透式纤维空气分布系统空气速度分布特性  

Velocity distribution characteristics of air through fabric air dispersion system in penetration mode

作　　者：陈孚江[1] 陈焕新[1] 董媛媛[1] 朱国鹏[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2010年第11期96-99,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：'十一五'国家科技支撑计划资助项目(2008BAJ12B03)

摘　　要：基于多孔介质模型建立了渗透式纤维空气分布系统的计算流体动力学(CFD)仿真模型,通过数值模拟和实验测试对比分析了渗透送风时纤维空气分布系统内部空腔区域及表面空气流动特性.结果表明:送风时空腔内部空气流速呈辐射状向四周衰减,沿垂直于纤维壁面的方向向外扩散,然后向下方聚集流动;两侧空气流速低于下方区域的空气流速,且沿管长方向空气流速分布均匀;空气在纤维结构层的微孔隙中的流动状态属于非达西流.The porous medium model was employed to set up a simulated model using computer fluid dynamic（CFD）method for a fabric air dispersion system（FADS）in penetration mode.Airflow characteristics in the cavity and on the surface of a FADS was studied numerically and experimentally when air was supplied by FADS.The results show that the velocity of airflow decreases radially from the central zone to the surrounding zone,and disperses out through tiny-sized pores in the direction perpendicular to the porous fiber,and then assembles to the bottom zone.In addition,the air on the bilateral zone flows at a lower velocity than that near the bottom zones of FADS,and the air close to the FADS is evenly distributed along the length direction.Furthermore,the airflow within fiber pores is in the non-Darcy flow state.

关 键 词：通风 多孔介质 纤维空气分布系统 渗透式 速度分布 非达西流 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]