Iowa State engineers study the benefits of adding a second, smaller rotor to wind turbines

Hui Hu picked up a 3-D printed model of a typical wind turbine and began explaining two problems with the big, tall, three-bladed machines. First, said the Iowa State University professor of aerospace engineering, check out the base of each blade. They’re big, round structural pieces. They’re not shaped like an airfoil. And so they … Continue reading Iowa State engineers study the benefits of adding a second, smaller rotor to wind turbines