The Aerodynamic behavioral Study of Two Wing's Wake Flow in Tandem Arrangement

This paper is aimed to study the aerodynamic properties and flow structures of flow field between two wings in tandem arrangement, including the experiments of force and velocity measurement in the wind tunnel. From the hot-wire velocity measurements, the spectral analysis is also conducted to observe the flow development of the trailing vortices. It is found that there is a sudden drop of shedding frequency distribution at the distance of 4 to 5 times the chord length from the front wing when AOA=10°, which determines the distance between the front wing and following wing, and understand the dynamic response of following wing under the effect of trailing vortices from the front wing at constant angle of attacks. In addition, the aerodynamic performance of the following wing is drastically affected due to the impingement of the tip vortices or wake from the front wing as well.