| Autor: |
Skripkin Sergey, Tsoy Mikhail, Kuibin Pavel, Shtork Sergey |
| Jazyk: |
English<br />French |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
MATEC Web of Conferences, Vol 115, p 06004 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
2261-236X |
| DOI: |
10.1051/matecconf/201711506004 |
| Popis: |
Operation of hydraulic turbines beyond optimal conditions leads to formation of precessing vortex core in a draft tube that generates powerful pressure pulsations in a hydraulic system. In case of resonance it leads to stability decreasing of hydraulic unit and electrical grid on the whole. In present work, such regimes are explored in a conical part of simplified turbine model. Studies are performed at constant flowrate Q = 70 m3/h and varying the runner rotational speed to explore different loads of the hydroturbine unit. The experiments involve pressure measurements, high speed-visualization and velocity measurements by means of laser Doppler anemometer technique. Interesting finding is related with abrupt increasing precession frequency at low swirl parameter of flow near optimal regime. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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