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Ting Shi and Xueyuan Peng
Air compressors in hydrogen fuel cell vehicles play a crucial role in ensuring the stability of the cathode air system. However, they currently face challenges related to low efficiency and poor stability. To address these issues, the experimental setup ...
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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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Haoguang Zhang, Hao Wang, Qi Li, Fengyu Jing and Wuli Chu
The aim of this research was to explore the mechanisms underlying the effect of self-circulating casing treatment with different circumferential coverage ratios on the aerodynamic performance of a transonic centrifugal compressor. A three-dimensional uns...
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Oana Dumitrescu, Mihnea Gall and Valeriu Dragan
Design of linear cascades for high-speed bladed machinery.
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Tobias Haeckel, Dominik Paul, Sebastian Leichtfuß, Heinz-Peter Schiffer and Werner Eißler
The surge limit of centrifugal compressors is a key parameter in the design process of modern turbochargers. Numerical methods like steady-state simulations are state-of-the-art methods for predicting the performance of the centrifugal compressor. In con...
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Xavier Flete, Nicolas Binder, Yannick Bousquet and Sandrine Cros
In the current study, full-stage unsteady simulations were performed to investigate rotating instability inception mechanisms in a particularly large tip clearance centrifugal compressor with a vaneless diffuser and a volute. Four operating points along ...
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Guo Li, Shuchun Huang, Wanqiu Lu, Junbo Liu, Shuiting Ding, Gong Zhang and Bo Zhen
Probabilistic failure risk analysis of aeroengine life-limited parts is of great significance for flight safety. Current probabilistic failure risk analysis uses equal amplitude load calculations for conservative estimation, avoiding inclusion of the int...
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Nicolas Poujol, Martin Buisson, Pierre Duquesne and Isabelle Trébinjac
In centrifugal compressors, Mild Surge (MS) leads to unstable operation. Previous experimental work on a centrifugal compressor designed and built by Safran Helicopter Engines (SafranHE) showed that MS corresponds to the pulsation of an alternate stall p...
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Shuli Hong, Jun Chi, Xin Xiang and Weiyu Lu
A centrifugal compressor of a micro turbine generator system is investigated by the theoretical model and numerical analysis to explore the characteristics of the tip leakage vortex as the centrifugal compressor approaches stall. The numerical simulation...
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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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