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Filip Grapow and Grzegorz Liskiewicz
In this paper, the Greitzer surge model was systematically analysed with the model compressor duct length Lc as the tuning parameter. The surge phenomenon is known to induce a serious risk to centrifugal compressor operation. The two-dimensional Greitzer...
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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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Johannes Ratz, Sebastian Leichtfuß, Maximilian Beck, Heinz-Peter Schiffer and Friedrich Fröhlig
Currently, 3D-CFD design optimization of centrifugal compressors in terms of the surge margin is one major unresolved issue. On that account, this paper introduces a new kind of objective function. The objective function is based on local flow parameters...
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Johannes Bühler, Sebastian Leichtfuß, Heinz-Peter Schiffer, Thomas Lischer and Simon Raabe
Compressor surge has been investigated and predicted since the early days of turbomachinery research. Experimental testing of turbomachinery applications is still needed to determine whether stable compressor operation is possible in the expected applica...
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Sebastian Leichtfuß, Johannes Bühler, Heinz-Peter Schiffer, Patrick Peters and Michael Hanna
This paper provides an investigation of a casing treatment (CT) approach for pressure ratio improvements of centrifugal compressors between peak efficiency and surge. Results were experimentally verified for a variety of automotive turbocharger compresso...
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Jonna Tiainen, Aki Grönman, Ahti Jaatinen-Värri and Jari Backman
The decrease in the performance of centrifugal compressors operating at low Reynolds numbers (e.g., unmanned aerial vehicles at high altitudes or small turbomachines) can reach 10% due to increased friction. The purposes of this review are to represent t...
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Jonna Tiainen, Aki Grönman, Ahti Jaatinen-Värri and Jari Backman
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Mohammadjavad Hosseini, Zhenzhong Sun, Xiao He and Xinqian Zheng
A high-performance centrifugal compressor is needed for numerous industry applications nowadays. The radial gap ratio between the impeller and the diffuser vanes plays an important role in the improvement of the compressor performance. In this paper, the...
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Mohammadjavad Hosseini, Zhenzhong Sun, Xiao He and Xinqian Zheng
A high-performance centrifugal compressor is needed for numerous industry applications nowadays. The radial gap ratio between the impeller and the diffuser vanes plays an important role in the improvement of the compressor performance. In this paper, the...
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Pei-Yuan Li, Chu-Wei Gu and Yin Song
This paper presents an optimization design method for centrifugal compressors based on one-dimensional calculations and analyses. It consists of two parts: (1) centrifugal compressor geometry optimization based on one-dimensional calculations and (2) mat...
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Xiao He and Xinqian Zheng
The mechanism for the optimal sweep angle of centrifugal compressors has been proposed, which benefits high-efficiency designs of centrifugal compressors for turbocharger and gas turbine engine applications.
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Zhiyuan Liu, Weiwei Luo, Qingjun Zhao, Wei Zhao and Jianzhong Xu
The compressor is a key component in the supercritical carbon dioxide (SCO2) Brayton cycle. In this paper, the authors designed a series of supercritical CO2 compressors with different parameters. These compressors are designed for 100 MWe, 10 MWe and 1 ...
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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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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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Matt Taher and Fred Evans
This paper presents a new improved approach to calculation of polytropic performance of centrifugal compressors. This rapid solution technique is based upon a constant efficiency, temperature-entropy polytropic path represented by cubic polynomials. New ...
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A centrifugal carbon dioxide compressor is a kind of general machine with extensive applications. The geometry of the side chambers of the compressors can be determined by studying the rotor-stator cavity with centripetal through-flow. In this paper, num...
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Mohammad Omidi, Shu-Jie Liu, Soheil Mohtaram, Hui-Tian Lu and Hong-Chao Zhang
It has always been important to study the development and improvement of the design of turbomachines, owing to the numerous uses of turbomachines and their high energy consumption. Accordingly, optimizing turbomachine performance is crucial for sustainab...
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Wenlin Xie, Yong Tian, Peng Jiang, Bo Wang and Xiang Xu
The supercritical carbon dioxide (S-CO2) Brayton cycle efficiency increases as the compressor inlet condition approaches the critical point. However, the thermodynamic properties of CO2 vary dramatically near the critical point, and phase change is most ...
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Xing Li, Ning Huang, Guanyan Chen, Yanli Zhang, Yang Zhao, Jie Zhang and Ding Tong
Although inlet bent pipes are usually adopted due to limited installation space, the influences of different bend pipes on the inlet flow characteristics and performance of centrifugal compressors are still unclear. The numerical simulation of a centrifu...
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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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