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

Ivanov, Vyacheslav; Kozhukhov, Y. V.; Nguyen, Minh Le

doi:10.1051/e3sconf/201914006008

Cited by 5 publications

(2 citation statements)

References 16 publications

(15 reference statements)

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“…Here, a computational model has been developed for the multivariate analysis of low-flow stages. The results of verification and validation were used to create mathematical models based on numerical databases [20]. Further work is should involve an increase in operating pressure and the issuance of recommendations on the use of wall roughness settings.…”

Section: Discussionmentioning

confidence: 99%

Verification and Validation of CFD Modeling for Low-Flow-Coefficient Centrifugal Compressor Stages

et al. 2021

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In this paper, the numerical model of a centrifugal compressor low-flow stage is verified. The gaps and labyrinth seals were simulated in the numerical model. The task was to determine the optimal settings for high-quality modeling of the low-flow stages. The intergrid interface application issues, turbulence and roughness models are considered. The obtained numerical model settings are used to validate seven model stages for the range of the optimal conditional flow coefficient with Φopt = 0.008–0.018 and the conditional Mach number Mu = 0.785–0.804. The simulation results are compared with the experimental data. The high pressure stage-7 (HPS-7) stage with Φopt = 0.010 and Mu = 0.60 at different inlet pressure of 4, 10 and 40 atm is considered separately. Acceptable validation results are obtained with the recommended numerical model settings; the modeling uncertainty for the polytropic pressure coefficient δη*pol < 4% for the efficiency coefficient δη*pol exceeds the limit of 4% only in the two most low-flow stages, U and V.

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Section: Discussionmentioning

confidence: 99%

Verification and Validation of CFD Modeling for Low-Flow-Coefficient Centrifugal Compressor Stages

et al. 2021

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“…Additionally it is necessary to apply methods of calculating the properties of real gases [8][9][10]. In particular, there are studies by CFD methods of low-flow stages of a centrifugal compressor [11][12][13][14][15][16]. The flow path of the stage, the sketch of which is shown in The aim of this work is to obtain the fluid dynamics characteristics of the low-flow stage SVD-22 by modeling the flow of a viscous gas in the flow path using computational fluid dynamics methods and comparing the obtained characteristics with the results obtained as a result of a full-scale experiment -verification of the calculation data.…”

Section: Methodsmentioning

confidence: 99%

Research of a Spatial Flow of a Low-Flow Stage of a Svd-22 Centrifugal Compressor by Computational Fluid Dynamics Methods Using Super-Computer Technologies

et al. 2020

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This paper provides the results of the study of a spatial flow in a low-flow stage of a SVD-22 centrifugal compressor of computational fluid dynamics methods using the Ansys CFX 14.0 software package. Low flow stages are used as the last stages of multistage centrifugal compressors. Such multistage compressors are widely used in boosting compressor stations for natural gas, in chemical industries. The flow features in low-flow stages require independent research. This is due to the fact that the developed techniques for designing centrifugal compressor stages are created for medium-flow and high-flow stages and do not apply to low-flow stages. Generally at manufacturing new centrifugal compressors, it is impossible to make a control measurement of the parameters of the working process inside the flow path elements. Computational fluid dynamics methods are widely used to overcome this difficulties. However verification and validation of CFD methods are necessary for accurate modeling of the workflow. All calculations were conducted on one of the SPbPU clusters. Parameters of one cluster node: AMD Opteron 280 2 cores, 8GB RAM. The calculations were conducted using 4 nodes (HP MPI Distributed Parallel startup type) with their full load by parallelizing processes on each node.

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Application of Super-Computer Technologies in the Research and Improvement of Steps and Elements of the Flow Path of the Turbocompressors

et al. 2020

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This paper presents the results of the study of the spatial flow in the turbocompressors elements of computational fluid dynamics methods using the Ansys CFX software package on a multiprocessor computer system. Five objects of research are considered: 1) flow path of an intermediate stage of an average-flow centrifugal compressor; 2) flow path of the low-flow centrifugal compressor stage; 3) a natural gas centrifugal compressor stage; 4) vaned diffuser of the first stage of an industrial multistage centrifugal compressor; 5) adjustable inlet stator of the first stage of an industrial turbocompressors. Generally at manufacturing new centrifugal compressors, it is impossible to make a control measurement of the parameters of the working process inside the flow path elements. Computational fluid dynamics methods are widely used to overcome this difficulties. However verification and validation of CFD methods are necessary for accurate modeling of the workflow. All calculations were performed on one of the SPbPU clusters. Parameters of one cluster: AMD Opteron 280 4 cores. The calculations were carried out with parallel running of the processors: HP MPI Distributed Parallel and HP MPI Local Parallel for different objects.

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

Cited by 5 publications

References 16 publications

Verification and Validation of CFD Modeling for Low-Flow-Coefficient Centrifugal Compressor Stages

Verification and Validation of CFD Modeling for Low-Flow-Coefficient Centrifugal Compressor Stages

Research of a Spatial Flow of a Low-Flow Stage of a Svd-22 Centrifugal Compressor by Computational Fluid Dynamics Methods Using Super-Computer Technologies

Application of Super-Computer Technologies in the Research and Improvement of Steps and Elements of the Flow Path of the Turbocompressors

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