Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 11, 2020 - November 13, 2020
Generally, for centrifugal compressors with low specific speed, the wall friction loss accounts for a large percentage of flow loss. It is necessary to decrease friction loss in order to develop high performance centrifugal compressor with low specific speed. In this paper, three dimensional RANS analysis and smart visualization of CFD results are applied to two different centrifugal compressors with low specific speed, whose design specifications are same, however meridional shape and blade shape are different from each other. Flow loss generation mechanism in the centrifugal compressors is complicated, because many phenomena appear in the flow field, such as separation and various vortices. By inspecting entropy production rate, the flow loss generation in the two different centrifugal compressors was evaluated precisely, and the loss mechanism and the loss amount of each flow field are investigated quantitatively.
