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

Li, Huan Jun; Zhang, Yimin

doi:10.1063/5.0121254

Cited by 8 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the first step, spatial point data of the blade profile provided by Krain's paper are transformed into a two-dimensional blade meridional plane by the mathematical method. Then, the shroud line and hub line of the meridional plane of the entire impeller calculation Source: Authors' work based on Krain and Hoffman (1989) and Li and Zhang (2022) HFF 33,7…”

Section: Model Description Based On the Workbenchmentioning

confidence: 99%

“…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%

See 1 more Smart Citation

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

Zhang

2023

HFF

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Model Description Based On the Workbenchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Zhang

2023

HFF

Self Cite

View full text Add to dashboard Cite

show abstract

Investigation of vaned diffuser endwall contouring technology for improving the stable operating range of a centrifugal compressor with an asymmetric volute

Cui,

Qin,

Jia

et al. 2024

Energy Science & Engineering

View full text Add to dashboard Cite

In this study, nonaxisymmetric endwall contouring technology is employed as a passive control strategy to enhance the stable operating range of a centrifugal compressor with an asymmetric volute. The endwall contouring method is applied to the hub‐side wall of the vaned diffuser within a centrifugal compressor stage. Instead of utilizing a flat hub as the baseline diffuser, various diffuser configurations featuring hub‐side contoured endwalls are explored, with adjustments in the peak radial position and peak height of the convex and concave profiles. Numerical simulations are conducted to evaluate the performance of the centrifugal compressor stage with both the baseline and contoured vaned diffusers. The investigation explores the underlying flow control mechanisms and establishes the effective endwall contouring guidelines. The findings highlight the effectiveness of endwall contouring in enhancing the stable operating range of centrifugal compressors. Notably, a substantial enhancement of 15.1% in the stable operating range is achieved by employing the contoured diffuser with the peak radial position near the vane leading edge (LE) and the peak height at 20% of the vane height. The endwall contoured diffusers reduce the positive LE incidence angles to direct the fluid toward the suction side (SS), and increase the radial velocity near the SS to suppress the hub‐suction corner separations in the diffuser passages near the volute tongue. These improvements collectively contribute to the enhancement of diffuser flow characteristics. Finally, a set of effective endwall contouring guidelines is proposed to guide the endwall contouring design for enhancing the stable operating range of centrifugal compressors.

show abstract

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

Li,

Zhang

2023

Physics of Fluids

View full text Add to dashboard Cite

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.

show abstract

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

Cited by 8 publications

References 34 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

Investigation of vaned diffuser endwall contouring technology for improving the stable operating range of a centrifugal compressor with an asymmetric volute

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

Contact Info

Product

Resources

About