The experience in application of methods of computational fluid dynamics in correction of the designed flow path of a two-stage compressor

Neverov, V. V.; Kozhukhov, Y. V.; Yablokov, Aleksey; Lebedev, A. A.

doi:10.1063/1.5051909

Cited by 12 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CFD methods are widely used to calculate turbocompressors [4][5][6][7]. Additionally it is necessary to apply methods of calculating the properties of real gases [8][9][10].…”

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

View full text Add to dashboard Cite

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.

show abstract

“…CFD methods are widely used to calculate turbocompressors [4][5][6][7]. Additionally it is necessary to apply methods of calculating the properties of real gases [8][9][10].…”

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

View full text Add to dashboard Cite

show abstract

“…In this paper, the feasibility of considering modeling in stages with 0.008 < Φ opt < 0.020 is investigated and the modeling uncertainty values are determined for some low-flowcoefficient stages. Modeling uncertainty levels can be used in design optimization as well as numerical methods improvement [16].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

“…When calculating the ncr rotor of a single-shaft five-stage CC that compresses hydrogencontaining gas (rotor length L = 1.605 m, mass Mr = 237.8 kg, shaft diameter in support bearings dsb = 0.07 m, maximum shaft diameter ds.max= 0.174 m, mass of the impellers Mimp = 13.3 ... 11.6 kg), with an increase in the coefficient of rigidity of the oil layer in the reference OS from 10 8 to 10 10 N / m, the speed of the first harmonic of ncr increased almost 1.3 times, the second harmonic -in approximately 1.5 times. Reduction of the stiffness coefficient of the gas layer kg in the end LS of the shaft (from 1.6*10 6 to 2*10 5 N / m) and in the LS dummis (from 4.6*10 6 to 5*10 5 N / m) with km equal 10 8 ...10 10 N / m practically does not affect the value ncr of the rotor [11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Some problem of centrifugal compressors upgrading

et al. 2018

View full text Add to dashboard Cite

The results of computational investigation of the influence of a gas labyrinth seals, oil end seals with floating rings and oil journal bearings lubricating layer stiffness coefficient on centrifugal compressor rotor critical speed are presented and analysed. The main principles of a method for axial forces acting on centrifugal compressor rotor calculation are listed. The method has been developed at the compressor, vacuum and refrigeration technologies department of SPbSTU. In addition, the estimation of method applicability in engineering calculations is given.

show abstract

The experience in application of methods of computational fluid dynamics in correction of the designed flow path of a two-stage compressor

Cited by 12 publications

References 4 publications

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

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

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

Some problem of centrifugal compressors upgrading

Contact Info

Product

Resources

About