Test results and status of the DOE/Sandia 34-m VAWT Test Bed

The DOE/Sandia 34-m VAWT Test Bed has been fully operational for over a year. During that time extensive performance data have been gathered. This paper first briefly discusses the background and evolution of this research turbine and its testing philosophy. Next, specific results are presented in the areas of aerodynamics, structural dynamics, and operation and control. The aerodynamics section primarily discusses measured versus predicted output power. In the structural dynamics section turbine response is presented with results shown for rotating natural frequencies and stresses at critical (blade) locations. Finally, operation and control results are presented, which include normal start/stop, speed variation, emergency handling and power quality issues. 16 refs., 11 figs., 1 tab.