Author: David Malcolm
Year Published: 2017
The vertical axis wind turbine was “re-invented” in 1970 by Peter South and Raj Rangi [1] of the Canadian National Research Council, Ottawa, where much development was carried out. Considerable development was also carried out at Sandia National Laboratories, New Mexico, especially into the structural dynamics of the curved Darrieus rotor [2, 3]. It was determined that the rotating frame effects of Coriolis action, rotational softening, and pretensioning played important roles.