Abstract
In order to improve the performance of a Wells turbine, the endplate, which is thin plate and has slightly larger size than the turbine rotor, have been equipped on the tip of the turbine rotor. The effect of endplate has been investigated by an steady 3-dimensional Navier-Stokes numerical simulation. As a result, turbine efficiency can be increased and stall characteristics of the blade can be improved by the endplate. Contours of circumferential velocity show the disappearance of large separation region along the blade suction surface by the endplate.
