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Hysteretic Characteristics of the Wells Turbine : Deep Stall Condition

2004; The Japan Society of Mechanical Engineers; Volume: 2004; Linguagem: Inglês

10.1299/jsmefed.2004.300

2424-2896

Mohammad Arif Hasan Mamun, Yoichi KINOUE, Toshiaki Setoguchi, Kenji Kaneko,

Wave and Wind Energy Systems

In order to make clear the hysteresis behavior of Wells turbine performance in deep stall condetion, experimental and numerical investigations were made fot the hsteretic characteristics indeep stall condition of Wells Turbien. The experimental investigation was mede by the use of the turbine equipment in which a sinusoidal flow condition was simulated. The numerical investigation was made by an unsteady three-dimensional Navier-Stokes numerical simulation. The experimantal and calculated turbine unsteady performances show characteristic two hysteretic loops. The counterclockwise hysteresis loop in unstalled condition can be associated with the separation on the suction surface near the hub, whereas the clockwise hysteresis loop in deep stall condition can be associated with the separation on the suction surface near the tip.