Effect of Airfoil Concavity on Wind Turbine Blade Performances

Figure 1

Test system. 1: wind tunnel; 2: smoke generator; 3: monitor; 4: computer; 5: signal collector; 6: high-frequency camera; 7 and 8: synchronous triggers; 9–11: delay trigger; 12: master computer; 13: laser; 14: blade; 15: generator; 16: tail rudder; 17: tower; 18: base; 19: Fluke Norma 5000; 20: load; 21: ground protection; 22: computer.