Disputation Jelle Kranenbarg

Jelle Kranenberg has studied the flow under low-load operating conditions for a Kaplan model turbine, specifically the Porjus U9 model. The disputation is scheduled for Thursday, September 25th, at 9 a.m.

Jelle Kranenbarg has used computational fluid dynamics (CFD), to explore a mitigation strategy that reduces pressure pulsations during low-load operating conditions.

The idea is to limit swirl and, consequently, the pressure pulsations caused by the flow structures by employing asynchronous guide vanes. This involves adjusting some guide vanes to a larger opening angle, while keeping the others closed and maintaining the same power output. Unlike other mitigation techniques, no additional installations are needed aside from an option to control some of the guide vanes asynchronously. CFD is combined with machine learning to explore various guide vane configurations efficiently.

Mitigation of the Pressure Pulsations in a Hydraulic Axial Turbine with Asynchronous Guide Vanes
The thesis can be found here

Link for the disputation

Division of Fluid and Experimental Mechanics
Department of Engineering Sciences and Mathematics
Luleå University of Technology