Abstract
Some specific wind patterns were detected from the natural wind data measured near a VAWT; the corresponding rotational speed variations of the VAWT were investigated. The rotational speed change width tended to increase with increasing the initial wind speed of each pattern. The rotational speed variation of the VAWT was able to be simulated with about 4 % error by introducing the effective wind speed ratio (EWSR), which was estimated to be 63.4 % for the present study.
