Yaguang Heng, Bo Hu, Qifeng Jiang, Zhengwei Wang and Xiaobing Liu
A review on the rotating stall in the vaneless diffuser of centrifugal compressors is presented showing that different stall modes characterized by different numbers of cells can be detected within the diffuser even if the operating condition remains unc...
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Elias Sundström, Mihai Mihaescu, Marco Giachi, Elisabetta Belardini and Vittorio Michelassi
Numerical simulations based on the large eddy simulation approach were conducted with the aim to explore vaneless diffuser rotating stall instability in a centrifugal compressor. The effect of the impeller blade passage was included as an inlet boundary ...
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Pierre Duquesne, Joffrey Chanéac, Gabriel Mondin and Jérôme Dombard
Boundary-layer flow separation is a common flow feature in many engineering applications. The consequences of flow separation in turbomachinery can be disastrous in terms of performance, stability and noise. In this context, flow separation is particular...
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Yunfeng Wu, Qingkuo Li, Hang Yuan, Ziliang Li, Shiji Zhou, Ge Han and Xingen Lu
High-pressure ratio centrifugal compressors? diffusers face challenges from high-velocity, non-uniform flow at the impeller outlet, decreasing efficiency and stall margin. To address this, this paper presents a novel vaned diffuser passage design method ...
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Yifan Wang, Kun Jin, Xingxing Huang, Fei Gai, Zhengwei Wang, Xingmin Liu and Lingjiu Zhou
This paper focuses on a 1000 MW Francis turbine and conducts a numerical analysis of the entire flow passage using computational fluid dynamics (CFD) under steady-state conditions. Building upon prior research, we further investigate the impact of an une...
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