Francis-99 Workshop 1: steady operation of Francis turbines

Francis-99 is a set of upcoming workshops jointly organized by the Norwegian University of Science and Technology (NTNU), Norway and Luleå University of Technology (LTU), Sweden in the same spirit as the previous Turbine-99 workshops. The Francis-99 workshops aim during the coming years to determine the state of the art of high head Francis turbine simulations (flow and structure) under steady and transient operating conditions as well as promote their development and knowledge dissemination openly. Three workshops are initially planned:

- Workshop 1: steady operation of Francis turbines (December 2014)

- Workshop 2: transient operation of Francis turbines (December 2016)

- Workshop 3: FSI of Francis turbines (December 2018)

A high head Francis turbine model, named the Tokke model, has been designed and experimentally investigated at the Water Power Laboratory, NTNU. The complete geometry of the model and mesh are now freely available on the site www.francis‑99.org together with a large set of experimental pressure and velocity measurements. The organisers expect this geometry to become with time a reference test case to the hydraulic community for research and development on high head Francis turbines and the workshops a meeting place to discuss developments, potentials, issues... on a common and open test case.

The present proceeding contains the papers presented at the first workshop at NTNU the 15th and 16th of December 2014. 50 participants were present at the workshop and a total of 14 papers were presented. A large variety of codes and models were used highlighting different issues in the simulation of high Francis turbines.

The editors:

Prof. Michel J. Cervantes (LTU, NTNU)

Dr. Chirag Trivedi (NTNU)

Prof O.G. Dahlhaug (NTNU)

Prof. T. Nielsen (NTNU)