LDV measurements in the LTU test rig

During the last couple of weeks, preparation work for laser Doppler velocimetry  (LDV) measurements in the draft tube cone of the LTU test rig has been undertaken.  The plan is to perform these velocity measurements both during steady operation, as well as when RVR-mitigation is being performed. The goal of these measurements is to enhance the understanding of the flow physics occurring during mitigation.