期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：240
期号：2
页码：1-12
DOI：10.1088/1755-1315/240/2/022021
出版社：IOP Publishing
摘要：This paper presents a study of the inception mechanism of a rotating stall instability identified on a model propeller turbine during speed-no-load (SNL) operation. It seeks to understand the origins of columnar vortices dominating the flow in the runner in SNL. It is based on the use of an experimentally validated flow simulation strategy using the SAS turbulence modelling approach. Two sets of boundary conditions were used to identify the onset of the columnar vortices and confirm that they are linked with a boundary layer separation on the turbine head cover.
