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The Investigation of Mechanisms on Pipe Diffuser Leading Edge Vortex Generation and Development in Centrifugal Compressor by Ge Han; Chengwu Yang; Shixun Wu; Shengfeng Zhao; Xingen Lu is a Engineering article available to read on EtoBox.

What is The Investigation of Mechanisms on Pipe Diffuser Leading Edge Vortex Generation and Development in Centrifugal Compressor about?

Pipe diffuser can adapt the high Mach number distorted flow in high pressure ratio centrifugal compressors because of its special scallop leading edge. However, the special leading edge could generate pair vortices and it is not clear if the pair vortices have positive or negative effect on pipe diffuser performance. Besides, the generation and development of pair vortices are also need to be investigated. This work is aimed at uncovering the influence of vortices on aerodynamic loss in pipe diffuser. Pipe diffusers with several different geometries are designed for a high pressure ratio centrifugal compressor used in a small gas turbine. The generation and evolution of pair vortices in pipe diffuser passages are studied by validated state-of-the-art CFD method. Detailed understandings of the influence of different geometries on pair vortices and pipe diffuser performance are provided. Through these works, it is found that the pair vortices could enhance the flow mixing of high and low energy flow in pipe diffuser passage near throat, thus the boundary layer becomes thin, and the flow separation is suppressed near pipe diffuser throat under large negative incidence. However, pair v

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Author

Ge Han; Chengwu Yang; Shixun Wu; Shengfeng Zhao; Xingen Lu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)