Abstract
The biplane Wells turbine for wave power generator has many merits. However it has hysteretic characteristics in a reciprocating flow, where results in the inaccurate prediction of performance in a quasi-steady analysis. In order to clarify the hysteretic characteristics, an experimental investigation has been made by use of a sinusoidal axial flow. The results have shown that hysteresis is less sensitive to the gap to chord ratio and more sensitive to the arrangement of biplane rotor. By means of flow visualization, the relation between the hysteretic characteristics and the behavior of wake has been discussed.
