An exerimental study of the flow in a sharp-heel draft tube

Abstract: The goal of the Turbine 99 Draft Tube experiments is to provide extensive experimental data on a well-defined sharp-heel draft-tube flow. The data bank has served as calibration data for the simulation challenge presented by the Turbine 99 workshop in Porjus in June 1999. This thesis gives some background on draft-tube flows in general and discusses in some detail the parameters and flow conditions relevant to the Turbine 99 draft tube. Some comments on the research and development conducted so far in the project and future plans are given at the end. In the three accompanying papers, details of the developments and the scientific results are presented: Paper 1. Presents the scope of the work and some initial results from the measurements Paper 2. Discusses the quality of the measurements Paper 3. Presents some of the results from the measurements