Free-stream turbine start-up under load
| Autor: | Daria Nemova, Eugene Kotov, Svyatoslav Khorobrov, Vladimir Kalaev, Daniil Gorbatov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
lcsh:GE1-350
0209 industrial biotechnology Computer science business.industry media_common.quotation_subject 0211 other engineering and technologies Angular velocity 02 engineering and technology Mechanics Computational fluid dynamics Solver Inertia Rotation Turbine Power (physics) 020901 industrial engineering & automation 021108 energy business Reynolds-averaged Navier–Stokes equations lcsh:Environmental sciences media_common |
| Zdroj: | E3S Web of Conferences, Vol 140, p 06009 (2019) |
| ISSN: | 2267-1242 |
| Popis: | Free-stream turbine is an alternative to classical high-head turbines. On one hand, it produces less power, on the other hand, it requires less ser-vice and construction and might be an eco-friendlier option. We have modelled the start-up of a free-stream turbine, which consists of a wheel and a generator, using CFD methods. Unsteady RANS method with k-ω SST model was employed to describe turbulence. We have used finite-volume solver Ansys FLUENT on unstructured mesh. Moving mesh approach was applied for the wheel rotation. We have based the blade sys-tem design on several simple assumptions. Wheel inertia and generator load were taken into account through simple moment equations. Velocity fields during different moments of time were obtained. We have obtained both momentum and power of the wheel curves over time and reviewed cases with generator presence and absence. Angular velocity curves comparison over time is presented for two cases. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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