Abstract
In this study, two horizontal axis wind turbines with delta-wing were tested. The starting torque coefficient reached half the value of Savonius wind turbine and the power coefficient of one model reached the level of Dalius wind turbine. To examine these characteristics, torque coefficient was estimated by using wind tunnel data of delta-wing. Adding to this, to analyze the flow around the turbine, visualization by surface tuft method and numerical simulation were conducted. The result showed that the leading edge separated vortex which is characteristic phenomena of delta wing has little effect on the starting torque coefficient.
