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Numerical Prediction of Efficiency, Cavitation and Unsteady Phenomena in Water Turbines

[+] Author Affiliations
Dragica Jošt, Andrej Lipej, Peter Mežnar

Turboinstitut, Ljubljana, Slovenia

Paper No. ESDA2008-59563, pp. 157-166; 10 pages
doi:10.1115/ESDA2008-59563
From:
  • ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis
  • Volume 4: Fatigue and Fracture; Fluids Engineering; Heat Transfer; Mechatronics; Micro and Nano Technology; Optical Engineering; Robotics; Systems Engineering; Industrial Applications
  • Haifa, Israel, July 7–9, 2008
  • Conference Sponsors: International
  • ISBN: 978-0-7918-4838-8 | eISBN: 0-7918-3827-7
  • Copyright © 2008 by ASME

abstract

The paper presents numerical analysis of the flow in all types of water turbines. Analysis was performed by ANSYS CFX-11.0 computer code. A detailed analysis of complete radial and axial turbine is presented. On the basis of numerical results efficiency and cavitation are predicted and compared to the measured results obtained on test rigs in Turboinstitut. The paper presents also numerical analysis of the flow in a two jet Pelton turbine. The analysis was divided into two parts. At first a steady state analysis of the flow in the piping system with the jets at the outlet was performed. The second step was unsteady analysis of the runner with jets. The casing was not included in the domain of calculation. The predicted efficiency is compared to the measured values.

Copyright © 2008 by ASME

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