Optimization of a seven-stage centrifugal compressor by using a quasi-3D inverse design method

Nili-Ahmadabadi, Mahdi; Poursadegh, Farzad

doi:10.1007/s12206-013-0854-8

Cited by 5 publications

(6 citation statements)

References 5 publications

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“…A smaller value of this parameter results in a slower convergence rate of the algorithm. Note that if the value of this adjustment parameter exceeds a certain threshold, the design algorithm will diverge [16]. Therefore, allocating an optimal value to this constant is of signi cant importance to minimize the computation costs.…”

Section: Ball-spine Inverse Design Algorithmmentioning

confidence: 99%

Inverse Design of a Centrifugal Pump on the Meridional Plane Using Ball-Spine Algorithm

2019

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This study developed an inverse design algorithm called Ball-Spine Algorithm (BSA) as a quasi-3D method and applied it to the meridional plane of a centrifugal pump impeller in an e ort to improve its performance. In this method, numerical analyses of viscous ow eld in the passage between two blades were coupled with BSA to modify the corresponding hub and shroud geometries. Here, full 3D Navier-Stokes equations were solved on a thin plane of ow instead of solving inviscid, quasi-3D ow equations on the meridional plane. To demonstrate the validity of the present work, the performance of a centrifugal pump was numerically investigated rst and then, it was compared with available experimental data. After de ning a target pressure distribution on the hub and shroud surfaces of the ow passage, a new impeller geometry was then obtained in accordance with the modi ed pressure distribution. The results indicated a good rate of convergence and desirable stability of BSA in the design of rotating ow passages with incompressible, viscous ows. Overall, the proposed design method gave rise to the following major improvements: an increase in static pressure along the streamline, a 5% increase in the pump total head, and delay in the onset of ow cavitation inside the impeller.

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Section: Ball-spine Inverse Design Algorithmmentioning

confidence: 99%

Inverse Design of a Centrifugal Pump on the Meridional Plane Using Ball-Spine Algorithm

2019

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“…It incorporates feedback-driven design and capitalizes on predefined flow field characteristics that accurately represent specific performance attributes 8 , facilitating the determination of blade geometry. This methodology has found applications across various domains, including compressors 9,10 , axial-flow pump machinery [11][12][13] , and turbines [14][15][16][17] .…”

Section: Introductionmentioning

confidence: 99%

Optimization for Turbomachinery Performance Using Inverse Design Method: Integrating Cascade System and Flow Characteristics

Ke,

Wei,

Guo

et al. 2024

Preprint

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Conventional optimization approaches for torque converters often rely on iterative trial-and-error methods, resulting in inherent limitations and uncertainties. To address these challenges and achieve performance optimization based on flow characteristics, this study proposes an inverse design method for turbomachinery. Introducing a novel index for blade loads, denoted as rvt , enables simultaneous optimization for both the cascade system and the flow field. Furthermore, a pump’s driven loads are introduced for the directional design of the blade load characteristics of high-capacity torque converters. Building upon the inverse design method, a directional optimization strategy is developed to enhance the pump capacity or torque ratio, guided by the concept of driven loads. The inverse design method allows for the targeted design of blade shapes while ensuring optimal blade shape and flow field distribution. The design results and the prototype demonstrate a significant 8.28% increase in pump capacity and a notable 4.9% reduction in the magnitude of blade loads in the internal flow field. These findings confirm the efficacy of the inverse design method in achieving directional enhancement of pump capacity while optimizing the smoothness of the internal flow field.

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“…In the field of fluid machinery, more and more schemes are implemented and verified via efficient and energy-saving CFD. [11][12][13][14][15][16][17][18] As a new scientific research method, it plays an increasingly important role. Many researchers have studied the internal flow field of centrifugal compressor by numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the flow characteristics of centrifugal compressor impeller with crack damage

Liang

Xiang

Wei

et al. 2021

Advances in Mechanical Engineering

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The distribution and characteristics of internal flow field of the impeller with crack damage in service environment was investigated via numerical simulation with RNG k-ε turbulence model. The diffuser and volute are added based on the original impeller to simulate the internal flow field comprehensively. It was found that along the flow direction, the pressure, velocity, and temperature of the fluid increase continuously, and the maximum value appears near the outlet of the impeller. The maximum pressure and velocity in the crack area are distributed around the middle section and the trailing edge of the crack. Entropy production theory was applied in the study of internal flow, which reveals that the entropy production becomes larger around the crack. The further propagation of the crack is promoted by the opening force perpendicular to the entrance direction of the middle crack, the corrosion propagation at the rear edge of the crack, and the thermal deformation of the blade. The accelerated crack process will finally lead to the blade fracture accident.

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Optimization of a seven-stage centrifugal compressor by using a quasi-3D inverse design method

Cited by 5 publications

References 5 publications

Inverse Design of a Centrifugal Pump on the Meridional Plane Using Ball-Spine Algorithm

Inverse Design of a Centrifugal Pump on the Meridional Plane Using Ball-Spine Algorithm

Optimization for Turbomachinery Performance Using Inverse Design Method: Integrating Cascade System and Flow Characteristics

Numerical study on the flow characteristics of centrifugal compressor impeller with crack damage

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