Investigation on the hydrodynamic damping using prescribed blade motion techniques

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F19%3APU134727" target="_blank" >RIV/00216305:26210/19:PU134727 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1755-1315/405/1/012017" target="_blank" >http://dx.doi.org/10.1088/1755-1315/405/1/012017</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1755-1315/405/1/012017" target="_blank" >10.1088/1755-1315/405/1/012017</a>

Result language
angličtina
Original language name
Investigation on the hydrodynamic damping using prescribed blade motion techniques
Original language description
Increasing requirements for a high efficiency in a wide operating range of hydraulic turbines lead to turbine designs being more susceptible for periodic and stochastic excitation forces. For periodic excitations like rotor-stator interaction, a large distance to runner natural frequencies is not always possible. And stochastic excitation may cause the runner to respond directly with one of its natural frequencies. Therefore, in both cases, the quantification of damping for runner mode shapes is necessary to predict dynamic stresses and to ensure the required lifetime. The main goal of this paper is to present numerical investigations of the hydrodynamic damping using unsteady CFD analyses with prescribed structural motion. The investigation is carried out on a simple hydrofoil, which is placed in a the cavitation tunnel test section. The natural vibration shape of the hydrofoil is prescribed as a periodic motion with the corresponding frequency. As a prerequisite, natural frequency and mode shape have to include the effects of water environment. Two different approaches (in time and frequency domain) have been applied and compared to 2-way fluid-structure-interaction analysis with respect to accuracy and calculation time. In addition numerical results are validated by compa
Czech name
—
Czech description
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Project
<a href="/en/project/EF16_026%2F0008392" target="_blank" >EF16_026/0008392: Computer Simulations for Effective Low-Emission Energy Engineering</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
IOP Conference Series: Earth and Environmental Science
ISBN
—
ISSN
1755-1315
e-ISSN
—
Number of pages
6
Pages from-to
1-6
Publisher name
Neuveden
Place of publication
neuveden
Event location
Stuttgart
Event date
Oct 9, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000562376700017

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