The Recent Progresses in Industrial Centrifugal Compressor Designs

Liang, Dingkun; Yang, Hanqian; Xu, C.; Jiang, Yuexiang; Yi, Zhongwei

doi:10.11648/j.ijfmts.20200602.13

Cited by 6 publications

(1 citation statement)

References 14 publications

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“…Centrifugal compressor is a complex fluid machine with high-speed rotation. Characterized by the high-pressure ratios, more comprehensive flow operating range, compact structure and high efficiency, it is widely used in petroleum, chemical and smelting industries (Li and Zhang, 2022; Liang et al , 2020; Ekradi and Madadi, 2020). The impeller is the heart of the centrifugal compressor.…”

Section: Introductionmentioning

confidence: 99%

Study of flow field and vibration characteristics of supersonic centrifugal impellers based on fluid-structure interaction

Zhang

2023

HFF

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Purpose There are three purposes in this paper: to verify the importance of bi-directional fluid-structure interaction algorithm for centrifugal impeller designs; to study the relationship between the flow inside the impeller and the vibration of the blade; study the influence of material properties on flow field and vibration of centrifugal blades. Design/methodology/approach First, a bi-directional fluid-structure coupling finite element numerical model of the supersonic semi-open centrifugal impeller is established based on the Workbench platform. Then, the calculation results of impeller polytropic efficiency and stage total pressure ratio are compared with the experimental results from the available literature. Finally, the flow field and vibrational characteristics of 17-4PH (PHB), aluminum alloy (AAL) and carbon fiber-reinforced plastic (CFP) blades are compared under different operating conditions. Findings The results show that the flow fields performance and blade vibration influence each other. The flow fields performance and vibration resistance of CFP blades are higher than those of 17-4PH (PHB) and aluminum alloy (AAL) blades. At the design speed, compared with the PHB blades and AAL blades, the CFP blades deformation is reduced by 34.5% and 9%, the stress is reduced by 69.6% and 20% and the impeller pressure ratio is increased by 0.8% and 0.14%, respectively. Originality/value The importance of fluid-structure interaction to the aerodynamic and structural design of centrifugal impeller is revealed, and the superiority over composite materials in the application of centrifugal impeller is verified.

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Section: Introductionmentioning

confidence: 99%

Study of flow field and vibration characteristics of supersonic centrifugal impellers based on fluid-structure interaction

Zhang

2023

HFF

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Lightweight design of the transonic centrifugal impeller based on fluid–structure coupling

Zhang

2022

Physics of Fluids

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The impeller is the core component of the centrifugal compressor. Aiming to solve problems related to a large mass, high energy consumption, and large vibration of the existing centrifugal impeller, a semi-open supersonic centrifugal impeller provided by Krain et al. was redesigned in this paper. The redesign was based on Tsai-Wu failure theory and the two-way fluid-structure coupling method. Firstly, the geometric and numerical models were established using the geometric data found in the literature. Then, the established geometric and numerical models were verified through experimental data. Finally, the impeller was optimized from three aspects: material lightweight, composite material layering, and tip clearance. The results have shown that following the optimization, the maximum impeller stress was reduced by 48.77% when compared to the traditional 17-4PH material impeller. The maximum vibration deformation was reduced by 60.4%, as well as the resonance probability. The pressure ratio was increased by 0.8%, and the pressure and velocity reverse gradient trend near the blade tip were significantly reduced, while the flow field was more stable. The research results presented in this paper hence provide a basis for the application of composite materials in centrifugal impellers.

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Influence of lightweight material on tip flow of a transonic centrifugal impeller based on bidirectional fluid-structure coupling

Li,

Zhang

2023

Physics of Fluids

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The energy consumption and stability of centrifugal impellers can be effectively improved by using a lightweight material. Tip flow is the main factor affecting energy consumption and operational stability of centrifugal impellers. In this study, the mechanism underlying the influence of material weight on the flow in the tip region of a centrifugal impeller was explored. First, a numerical model of a bidirectional fluid-structure coupling was established and validated. Then, a comparative analysis was conducted on the vibration deformation of 17-4PH, titanium alloy, aluminum alloy, and epoxy carbon UD (CFP) impellers under extreme stall conditions. Finally, the changing trends of shock wave structure, leakage flow, and secondary flow in the tip region of these four kinds of impellers were compared and analyzed. The results show that tip clearance decreases gradually with decreasing impeller material density. By comparing with a stainless-steel impeller, the tip clearance of a CFP impeller decreased by 53% at most, and the total displacement decreased by nearly 100% (except in the case of resonance). The shock wave of the CFP impeller can be characterized by fast detachment, fast dissipation, and minimal countercurrent. The leakage flow of the CFP impeller was uniform, the leakage vortex moved forward slowly, the volume of the vortex was small, and the flow velocity on the blade surface was also small. With decreasing impeller density, the influence of the secondary flow on the main flow gradually weakened. These results lay a theoretical foundation for optimizing the structural and aerodynamic design of centrifugal impellers.

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The Recent Progresses in Industrial Centrifugal Compressor Designs

Cited by 6 publications

References 14 publications

Study of flow field and vibration characteristics of supersonic centrifugal impellers based on fluid-structure interaction

Study of flow field and vibration characteristics of supersonic centrifugal impellers based on fluid-structure interaction

Lightweight design of the transonic centrifugal impeller based on fluid–structure coupling

Influence of lightweight material on tip flow of a transonic centrifugal impeller based on bidirectional fluid-structure coupling

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