Izvorni znanstveni članak
https://doi.org/10.1080/00051144.2020.1778237
Optimal design of sand blown wind tunnel
Bin Yang
; School of Chemical Engineering, Northwest University, Xi’an, People’s Republic of China
Yong Su
; School of Chemical Engineering, Northwest University, Xi’an, People’s Republic of China
Xiaosi Zhou
; School of Chemical Engineering, Northwest University, Xi’an, People’s Republic of China
Bo Tang
; School of Chemical Engineering, Northwest University, Xi’an, People’s Republic of China
Yang Zhang
; Department of Fluid Machinery and Engineering, Xi’an Jiaotong University, Xi’an, People’s Republic of China
Yinghui Ren
; School of Chemical Engineering, Northwest University, Xi’an, People’s Republic of China
Sažetak
This work investigates the airflow driven by dual axial-flow fans in an atmospheric boundary layer (ABL) wind tunnel and the expected entrainment of sand movement together. The present study is conducted via 3D numerical simulation based on modelling the entire wind tunnel, including the power fan sections. Three configurations of dual fans in the tunnel are proposed. Simulation results show that the airflow in the tunnel with dual-fan configuration can satisfy the logarithmic distribution law for ABL flows. The airflow driven by the dual fans placed together at the tunnel outlet is highly similar to that in the tunnel with single fans. Although the boundary layer thickness is reduced, the maximum airflow velocity (53.393 m/s) and turbulence intensity (12.02%), which are respectively 1.75 and 1.49 times higher than those under the single-fan configuration, can be reached when dual fans are separately placed at the tunnel inlet and outlet. The simulation and experiment manifest that the separated arrangement of dual fans in the tunnel should be suitable for the experimental study of aeolian sand transport. Some measures, such as wind tunnel construction adjustment and optimal roughness element arrangement, are necessary to guarantee the required boundary layer thickness in the wind tunnel.
Ključne riječi
Atmospheric boundary layer; wind tunnel; axial-flow fan; computational fluid dynamics; velocity profile; turbulence intensity
Hrčak ID:
239884
URI
Datum izdavanja:
25.6.2020.
Posjeta: 624 *