Flow Visualization Tests of Rotor Blades on a 300kW Wind Turbine Generation System

Abstract

This paper presents a number of flow visualization tests conducted on a 300kW WTGS rotor blades under evaluation now.
Aerodynamic phenomenon including flow separation, which is essential for the evaluation and improvement of rotor performance, has not been fully understood so far-Therefore a two way approach was made in this visualization study, one is oil flow method on the existing blades and the other is smoke wind tunnel test with two-dimentional blade section models.
These experiments show that the aerodynamic properties of blade between 75% and 95% radius position were excellent and various suggestions were obtained for the aerodynamic design of WTGS rotor blades.