Abstract
Various blades are used for fluid machinery such as wind turbines and pumps. This report focuses attention on wind turbine blades. Wind turbine generator systems consisting of wind turbines with propeller-type rotors on a horizontal axis employ turbine blades to effectively catch aerodynamic forces commonly represented by lift and drag. The thickness ratio of the blade is small at the blade tip (thin blade) and is large at the blade root (thick blade). The previous paper proposed that placing a cylindrical rod in front of a blade as a simplified stall control method for controlling the flow around the blade and avoiding stall phenomena improved the flow on the upper surface of the blade and extended the operable range significantly until the angle of attack reached the high attack angle region where a stall occurred. In this paper, a cylindrical rod in front of the thick blade was placed to examine the behavior of flow aro und the blade by using experimental and studied the effect of the cylindrical rod on the control of stall phenomena.
