Numerical Investigation of Different Radial Inlet Forms for Centrifugal Compressor and Influence of the Deflectors Number by Means of Computational Fluid Dynamics Methods with Computational Model Validation

Kozhukhov, Y. V.; Yun, V. K.; Reshetnikova, L V; Prokopovich, M V

doi:10.1088/1757-899x/90/1/012047

Cited by 19 publications

(6 citation statements)

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“…VIGV is designed to create swirling air supplied to the rotor blades of the first stage of the compressor in order to reduce the relative velocities and obtain optimal angles of flow on the rotor blade profile. There are examples of successful application of CFD methods to the input and output devices of a centrifugal compressor [17,18].…”

Section: Resultsmentioning

confidence: 99%

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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Section: Resultsmentioning

confidence: 99%

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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“…These three cross-sectional areas were selected as the variable parameters to optimize the geometric structure of the radial IC. Kozhukhov et al 26 numerically studied the radial chambers with five different geometries for the same centrifugal compressor. The local loss coefficient distributions at the outlet section were compared in detail, and the geometric structures related to the flow characteristics inside different chambers were analyzed based on the numerical results.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies on the influence of inlet guide vanes of centrifugal compressor on the flow field characteristics of inlet chamber

Han

Wang

Mao

et al. 2020

Advances in Mechanical Engineering

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Inlet chambers (IC) are the typical upstream component of centrifugal compressors, and inlet guide vanes in the IC have a great impact on its internal flow and aerodynamic loss, which will significantly influence the performance of the downstream compressor stages. In this paper, an experimental study was carried out on the flow characteristics inside a radial IC of an industrial centrifugal compressor, including five testing sections and 968 measuring points for two schemes with and without guide vanes. Detailed distributions of flow parameters on each section were obtained as well as the overall performance of the radial IC, and the causes of the flow loss inside the IC and the non-uniformity of flow parameters at the outlet section were investigated. Besides, numerical simulations were performed to further analyze the flow characteristics inside the radial IC. The experimental and numerical results indicate that, in the scheme without guide vanes, sudden expansions in the spiral channel and flow separations in the annular convergence channel are the major sources of flow loss and distortions generated in the radial IC; while in the scheme with guide vanes, the flow impacts, separations and wakes caused by the inappropriate design of guide vanes are the main reasons for the flow loss of the IC itself and the uneven flow distributions at the IC outlet.

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“…Further development of the centrifugal compressors [1][2][3][4][5][6][7][8][9][10][11][12] design is associated with increases in rotor rotational velocities, and as a result of loads on structural elements and plant capacities, while maintaining a sufficient level of operational safety both from the strength of the nodes and the stability of the performance. One of the causes of accidents on the compressor is getting into the surge due to an inoperative surge protection system, or not being able to take into account all the factors affecting the compressor in the surge state.…”

Section: Introductionmentioning

confidence: 99%

Improving the reliability of the compressor unit using the wavelet transform method

et al. 2019

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Centrifugal compressors are an integral part of modern production in such industries as gas transmission, oil refining, metallurgical, machine-building, mining, as well as in electric and heat power engineering. Interruptions in the operation or failures of compressors lead to decrease in profit or large material loss. Conditions should be created for the safe (stable) operation of centrifugal compressors. Surge is global (complete) loss of stability, an unacceptable phenomenon for a centrifugal compressor. Compressor surge protection must function during operation. The algorithms used to protect centrifugal compressors against surge have some drawbacks, which makes it impossible to reliably prevent surges. There are many methods for analyzing rapidly changing processes in the flow part of a centrifugal compressor. The wavelet theory is the most accurate and modern method. The use of the wavelet transform method for signal processing allows us to solve the problems of analyzing non-stationary processes of a centrifugal compressor to expand the acceptable range of work and build reliable operation of the anti-surge diagnostic system. In the future, it is possible to use other basic wavelet functions, for comparison and selection of the most suitable one, for the analysis of unsteady signals in a centrifugal compressor.

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Numerical Investigation of Different Radial Inlet Forms for Centrifugal Compressor and Influence of the Deflectors Number by Means of Computational Fluid Dynamics Methods with Computational Model Validation

Cited by 19 publications

References 0 publications

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

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

Experimental and numerical studies on the influence of inlet guide vanes of centrifugal compressor on the flow field characteristics of inlet chamber

Improving the reliability of the compressor unit using the wavelet transform method

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