Effects of screens set characteristics on the flow field in a wind tunnel

8th Brazilian Congress on Metrology

Santos, A.M.^1 ; Souza, D.B.^1 ; Costa, F.O.^1 ; Farias, M.H.^1 ; Massari, P. De L.^1 ; Araújo, S.^1 ; Zanirath, Y.B.^1

Fluid Dynamics Metrology Division, Scientific and Industrial Metrology, National Institute of Metrology, Quality and Technology (Inmetro), Rio de Janeiro, Brazil^1

关键词: Atmospheric wind tunnel;    Flow conditioners;    Flow straightener;    National metrology institutes;    Non-uniformities;    Turbulence level;    Vertical velocity profiles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/733/1/012001/pdf
DOI  :  10.1088/1742-6596/733/1/012001

来源: IOP

【 摘 要 】

Wind tunnels have broad range of applications, and although there are common elements among the different types of tunnels, the layout and configuration of each facility will depend on its particular purpose. The flow conditioners section is a common component for all tunnels, and frequently contains flow straighteners and screens [1]. The role of screens is to minimize non uniformities or turbulence level on the flow field. In this work, the development and characteristics of the vertical velocity profile along an atmospheric wind tunnel length were evaluated. By using such data as initial reference, the effects, on the flow, when screens set is inserted on it were analyzed, in order to identify which changes could be done in the wind tunnel configuration to improve the characteristics of the flow field. Such atmospheric wind tunnel is a facility which belongs to the Brazilian National Metrology Institute INMETRO.