Abstract
Large eddy simulation of internal flows of a mixed-flow pump is performed. The pump has open impeller blades and diffuser vanes. The objective of this research is to verify the accuracy of the pump performance prediction by LES with a particular emphasis placed on the instability characteristics. In this paper, we show the preliminary results by LES, in which the computational grids do not resolve turbulent boundary layer developed on blades surfaces. The LES successfully predicted the instability characteristics. By analyzing computed flow fields, we also investigated the detailed mechanism that leads to the instability characteristics. [This abstract is not included in the PDF]
