On the effect of moving blade grid on the flow field characteristics

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F18%3A00489992" target="_blank" >RIV/61388998:_____/18:00489992 - isvavai.cz</a>
Result on the web
<a href="https://www.epj-conferences.org/articles/epjconf/pdf/2018/15/epjconf_efm2018_02086.pdf" target="_blank" >https://www.epj-conferences.org/articles/epjconf/pdf/2018/15/epjconf_efm2018_02086.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/201817002086" target="_blank" >10.1051/epjconf/201817002086</a>

Result language
angličtina
Original language name
On the effect of moving blade grid on the flow field characteristics
Original language description
The motivation of this paper is the continual development of the blades for the last stage of the steam turbine. The biggest problem is the slenderness of such blades and the extreme sensitivity to aeroelastic vibrations (flutter) caused by the instabilities present in the flow. This experimental research is dealing with the aeroelastic binding of the moving blades located in the blade grid with the flow field and vice versa. A parallelogram is used to ensure one order of freedom of the blade. The grid has five blades in total, three of them are driven by force control using three shakers. The deviation as well as force response is measured by strain gauges and dynamometers. The flow field statistical as well as dynamical characteristics are measured by optical method Particle Image Velocimetry. The grid is connected to the blow-down wind tunnel with velocity range up to 40 m/s. The aeroelastic binding is investigated in dependency on used actuation frequency and maximal amplitude (the intensity of force actuation) and on different Reynolds numbers. The flow field and the wake behind each individual blade are studied and the maximal interaction is examined for individual inter-blade phase angle of the grid.
Czech name
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Czech description
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Project
<a href="/en/project/GA16-04546S" target="_blank" >GA16-04546S: Aero-elastic couplings and dynamic behaviour of rotational periodic bodies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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