Validation of a CFD model of a single stage centrifugal compressor by mass-averaged parameters

Bogdanets, Sergey; Блинов, В. Л.; Sedunin, Viacheslav A.; Komarov, O. V.; Skorohodov, Alexander

doi:10.1051/epjconf/201919600026

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…As the flow goes from the leading edge towards the trailing edge, it can be seen that relative Mach number in the shroud region becomes near zero [11]. The vortex formed near the trailing edge causes the mass flow near the region to decrease and results in flow separation [12].…”

Section: Resultsmentioning

confidence: 99%

Development of a Design Methodology for a Centrifugal Compressor with the Utilization of CFD

Aytaç

Yücel

2020

Politeknik Dergisi

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Section: Resultsmentioning

confidence: 99%

Development of a Design Methodology for a Centrifugal Compressor with the Utilization of CFD

Aytaç

Yücel

2020

Politeknik Dergisi

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“…In such cases, the flow part walls are considered to be adiabatic. In the case of medium and high consumable levels [1][2][3][4][5][6], this approach is justified by the relatively low influence on the flow in the main path of the stage and the gas-dynamic characteristics (GDC) of heat dissipation from the flow by the flow part walls. In addition, experimental stands with model stages, which are most often used for numerical modeling, are usually well insulated and provide the most accurate measurement of the increase in flow temperature of the stage for calculating the internal pressure by the enthalpy method.…”

Section: Introductionmentioning

confidence: 99%

The Problem of Accounting for Heat Exchange between the Flow and the Flow Part Surfaces When Modeling a Viscous Flow in Low-Flow Stages of a Centrifugal Compressor

et al. 2020

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In this paper, we review the problem of accounting for heat exchange between the flow and the flow part surfaces when creating a calculation model for modeling the workflow process of low-flow stages of a centrifugal compressor using computational fluid dynamics (CFD). The objective selected for this study was a low-flow intermediate type stage with the conditional flow coefficient Փ = 0.008 and the relative width at the impeller exit b2/D2 = 0.0133. We show that, in the case of modeling with widespread adiabatic wall simplification, the calculated temperature in the gaps between the impeller and the stator elements is significantly overestimated. Modeling of the working process in the flow part was carried out with a coupled heat exchanger, as well as with simplified accounting for heat transfer by setting the temperatures of the walls. The gas-dynamic characteristics of the stage were compared with the experimental data, the heat transfer influence on the disks friction coefficient was estimated, and the temperature distributions in the gaps between disks and in the flow part of the stage were analyzed. It is shown that the main principle when modeling the flow in low-flow stage is to ensure correct temperature distribution in the gaps.

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Numerical Study of the Flow in the Flow Path of a Centrifugal Natural Gas Compressor at Different Positions of the Inlet Guide Vane

Крутиков

Блинов

2021

HoBMSTU.SME

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The paper focuses on the problem of a possible expansion of the range of operating modes of a centrifugal natural gas compressor due to the rotation of the inlet guide vanes at different rotor speeds. The geometry of the flow path of the investigated object, obtained by three-dimensional scanning, is presented. On its basis, a numerical model is built and the influence of various factors of the formulation of the computational problem on the results of modeling the gas flow in the flow path of the compressor is analyzed. The calculations were performed using the k--ε and SST turbulence models for various parameters of the computational grid and conditions for averaging the flow parameters between the computational domains. The results obtained were compared with the nameplate and operational data. Recommendations on the formulation of the modeling problem are proposed, the results of the calculations are described, and the characteristics of the centrifugal compressor are plotted at different angles of the inlet guide vanes in a wide range of rotor speeds. The possible range of expansion of the operating modes of the investigated compressor is described, which can be provided by varying the position of the inlet guide vane

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Validation of a CFD model of a single stage centrifugal compressor by mass-averaged parameters

Cited by 4 publications

References 1 publication

Development of a Design Methodology for a Centrifugal Compressor with the Utilization of CFD

Development of a Design Methodology for a Centrifugal Compressor with the Utilization of CFD

The Problem of Accounting for Heat Exchange between the Flow and the Flow Part Surfaces When Modeling a Viscous Flow in Low-Flow Stages of a Centrifugal Compressor

Numerical Study of the Flow in the Flow Path of a Centrifugal Natural Gas Compressor at Different Positions of the Inlet Guide Vane

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