Stereo-PIV study of unsteady flow in a laboratory air hydro turbine model over a wide range of operating regimes
| Autor: | D. A. Suslov, D. K. Sharaborin, Sergey Shtork, I. V. Litvinov, E. U. Gorelikov |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Earth and Environmental Science. 774:012044 |
| ISSN: | 1755-1315 1755-1307 |
| Popis: | Swirl flow with the formation of a precessing vortex core (PVC) in a hydro turbine draft tube model was studied using Stereo-PIV and four acoustic sensors. Experiments were performed on an aerodynamic setup in a wide range of operating conditions of the hydro turbine. Using a spatial Fourier decomposition of pressure pulsation data obtained from four acoustic sensors, a PVC was observed for part-load operating regimes (0.3-0.7Qc ). Mean flow features were shown for the range of operating regimes from a deep part-load regime (0.3Qc ) to an overload regime (1.5Qc ). Based on phase-averaged velocity distributions, the PVC spatial structure was identified for maximum pressure pulsations on the cone walls of the draft tube. |
| Databáze: | OpenAIRE |
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