风口区空气流动的有限元模拟与实验研究

Numerical and experimental study on the flow characteristics in the vicinity of diffuser

通风和空调出风口的射流特性主要取决于出风口截面之前的一段管道内的流动状况,研究送风口的射流偏转特性有重要实用价值。应用湍流大涡模拟技术结合Taylor-Galerkin有限单元法对工程中常见工况下的风口区管道内的三维流场进行了数值模拟和实验研究,数值计算结果与实验结果符合较好。表明湍流大涡模拟方法适合于边界形状复杂,存在各向异性的大尺度涡的内流情况,能可靠地预报风口区空气流动的射流偏转特性。

In this paper , it presents the results of numerical simulation for curved duct flow under two cases of laboratorial conditions. Large eddy simulation （LES） with finite element method on computational fluid dynamics（CFD） and Taylor-Galerkin finite element method （FEM）are used in the simulation. The results of calculation coincide with experiments reasonably. It demonstrates that LES technique is especially available for flow situations with complicated geometrical boundary system.