Ran, H. J.Luo, X. W.Chen, Y. L.Xu, H. Y.Farhat, M.2014-01-092014-01-092014-01-09201310.1088/1755-1315/15/6/062048https://infoscience.epfl.ch/handle/20.500.14299/99104WOS:000324782300215Hysteresis phenomena demonstrate the lag between the generation and the removal of some physical phenomena. This paper studies the hysteresis phenomena of the head-drop in a scaled model pump turbine using experiment test and CFD methods. These lag is induced by complicated flow patterns, which influenced the reliability of rotating machine. Keeping the same measurement procedure is concluded for the hydraulic machine measurement.text::conference output::conference proceedings::conference paper