In this study, a reciprocating-type water turbine model that applies the principle of the Weis-Fogh mechanism was proposed, and the model's unsteady flow field was calculated by an advanced vortex method. The primary conditions were as follows: wing chord , wing shaft stroke length , and the maximum opening angle of the wing . The dynamic characteristics and unsteady flow fields of a Weis-Fogh type water turbine were investigated with velocity ratios = 1.0 ∼ 3.0. Force coefficients and acting on the wing in the and directions, respectively, were found to have a strong correlation each other. The size of a separated region on the back face of the wing increased as the velocity ratio increased and as the wing approached the opposite wall. The rapid drop in during a stroke increased as the velocity ratio increased, and the average and increased as the velocity ratio increased. The maximum efficiency of this water turbine was 14.1% at = 2.0 for one wing.
Numerical Calculation of Unsteady Flow Fields: Feasibility of Applying the Weis-Fogh Mechanism to Water Turbines
State Key Laboratory of Hydroscience and Engineering,
Contributed by the Fluids Engineering Division of ASME for publication in the Journal of Fluids Engineering. Manuscript received September 19, 2012; final manuscript received July 3, 2013; published online August 6, 2013. Assoc. Editor: Chunill Hah.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Ro, K., and Zhu, B. (August 6, 2013). "Numerical Calculation of Unsteady Flow Fields: Feasibility of Applying the Weis-Fogh Mechanism to Water Turbines." ASME. J. Fluids Eng. October 2013; 135(10): 101103. https://doi.org/10.1115/1.4024956
Download citation file:
- Ris (Zotero)
- Reference Manager