Influence of Ground and Ceiling Effect on High-Lift Device Using a Circular Cylinder with Tangential Blowing

The present paper describes the influence of ground and ceiling effect on high-lift device using a circular cylinder with tangential blowing. The experiments and numerical simulations were performed under the condition of Re = 2.7× 104. In the experiments, the test, such as the time-mean surface pressure measurements on the cylinder and flow visualizations were carried out for various momentum coefficients and clearances between the cylinder and the ground (or ceiling). In the numerical simulation, a commercially available computer code, SCRYU/Tetra, was used. Qualitative agreements between the experimental and numerical results were obtained with respect to the flow fields and the lift characteristics. The experimental and numerical results show that ground effect can enhance lift-drag ratio except stalling region, and that ceiling effect can not enhance lift-drag ratio.