Aerodynamic effects of impeller-diffuser axial misalignment in low-flow-coefficient centrifugal compressor

Wang, Zhiheng; Xi, Guang; Liu, QingFang

doi:10.1007/s11431-014-5697-8

Cited by 6 publications

(1 citation statement)

References 6 publications

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“…Modern commercial packages for modelling the workflow using computational gas dynamics methods are currently limited due to the need to train specialized personnel and the financial costs of acquiring equipment and licenses. Moreover, a number of scientific publications [9,10,11,12,13,14,15,16,17] show the efficiency of using computational methods in the design and study of centrifugal compressors low-flow rate stages. Computational methods are also used in the calculation of such an important phenomenon as surging in centrifugal compressors [18,19].…”

Section: Introductionmentioning

confidence: 99%

Head Math Model For The Low-Flow Impellers Of The Centrifugal Compressors

Ivanov

Kozhukhov

Nguyen³

2019

E3S Web Conf.

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A new mathematical model has been developed to determine the coefficient of internal and theoretical head in the variant design of the low-flow rate centrifugal compressors impellers. A parametric study of the flow part of the impeller is carried out. In total 1620 impellers are numericaly simulated. As a result, a numerical database of gas dynamic and geometric parameters was developed. Due to an a priori analysis, the relations of parameters with the geometric shape of the flow part are determined. The mathematical model is developed using gas-dynamic parameters and relations determined from numerical database. Using centrifugal compressor stage digital twins, a generalizing relationship has been developed to determine the complex of friction and leakage losses.The reliability of the math model is validated by the comparison with experimental data and the results of numerical experiment in digital twins, which are not involved in the model. The application of the head math model is determined in the range of the conditional flow coefficient 0.006<Φd<0.02 and the theoretical head coefficient 0.60 <ψt<0.72.

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Section: Introductionmentioning

confidence: 99%

Head Math Model For The Low-Flow Impellers Of The Centrifugal Compressors

Ivanov

Kozhukhov

Nguyen³

2019

E3S Web Conf.

View full text Add to dashboard Cite

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Effects of WC particles on microstructure and wear behavior of laser cladding Ni60 composite coatings

Chen¹,

Feng²,

Wei³

et al. 2023

Optics & Laser Technology

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Asymmetric flow in a double-suction centrifugal fan induced by an inclined impeller

Chen,

He,

Yang

et al. 2024

Physics of Fluids

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The impeller and volute of a centrifugal fan are designed to be coaxially placed; however, the impeller might be inclined about the central axis of the volute due to installation fault, inducing asymmetric flow in the left and right halves of the fan. We performed a detailed numerical investigation on the non-uniform and asymmetric flow in a double-suction multi-blade centrifugal fan with a slightly inclined impeller using the unsteady Reynolds-averaged Navier–Stokes simulation approach. The impeller is assumed to rotate about each of the two minor axes perpendicular to the central axis to model the inclination. This work aims to quantify the influence of the impeller inclination on the aerodynamic performance of the centrifugal fan and to reveal the physics of transient flow in the two halves of the fan to demonstrate the impact of various inclination ways. Numerical results denote that a slight impeller inclination could stabilize the flow in the fan, while the flow is highly asymmetric as the inclination is enhanced, and the efficiency of the fan decreases due to the recirculation generated by the interaction of flow exiting from the impeller. An in-depth inspection shows sharply intensified pressure fluctuation at the collector, where the local clearance varies. The flow entering the collector and impeller substantially decreases in velocity, resulting in separated flow in part of the blade passages. The flow in the volute is also asymmetric since the impeller outlet is biased toward the volute wall.

show abstract

Aerodynamic effects of impeller-diffuser axial misalignment in low-flow-coefficient centrifugal compressor

Cited by 6 publications

References 6 publications

Head Math Model For The Low-Flow Impellers Of The Centrifugal Compressors

Head Math Model For The Low-Flow Impellers Of The Centrifugal Compressors

Effects of WC particles on microstructure and wear behavior of laser cladding Ni60 composite coatings

Asymmetric flow in a double-suction centrifugal fan induced by an inclined impeller

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