The analysis of design and measured gas-dynamic characteristics of the centrifugal compressor within turboexpander aggregate

Rekstin, A. F.; Semenovskiy, V. B.; Galerkin, Yu. B.; Sokolov, A. A.

doi:10.1063/1.5051889

Cited by 8 publications

(2 citation statements)

References 4 publications

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“…4 shows the result of modeling the characteristics of the stage 0028-058-0373 according to the IDENT program [18]. The Universal modeling method is widely used in design practice [19][20][21][22][23] and accurately calculates the characteristics of stages and compressors and the flow parameters in the control sections of the flow path. It is sensible to carry out our CFD study at 6 values of the flow coefficients at which the stage was tested.…”

Section: Cfd Calculation Methodologymentioning

confidence: 99%

Stator elements optimization of centrifugal compressor intermediate type stage by CFD methods

2020

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Optimal gas-dynamic design is a complex and time-consuming process. Modern CFD methods help in solving optimization problems and reliably calculating characteristics of stator elements of centrifugal compressor stages. To carry out such calculations, it is necessary to create a parametrized model, which facilitates automation of the process of changing the flow path geometry, rebuilding its dimensions and the computational grid. Using the Direct Optimization program of the ANSYS software package, we have optimized the flow path of the stator elements of a centrifugal compressor intermediate type stage consisting of a vaneless diffuser and a return channel. In this paper, the MOGA (Multi-Objective Genetic Algorithm) optimization method was used. The object of the study was stator elements of one of the model stages designed by the Problem Laboratory of Compressor Engineering, SPbPU. The goal was to achieve the minimum value of the loss coefficient of stator elements when changing 5 geometric parameters: the number of vanes, the inlet vane angle, the height of the vane at the inlet to the return channel vane cascade, the radius of curvature of the leading edge and the thickness of the vane profile. For the best variants based on the results of optimization, the characteristics of the loss coefficient depending on the flow rate coefficient were calculated, their characteristics were compared with the initial variant of the stator elements. The best variant in the design mode has a loss coefficient 4.4% lower than the reference model. With a flow rate coefficient of 1.63 times greater than the calculated one, the optimized variant’s loss coefficient is 33% less.

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Section: Cfd Calculation Methodologymentioning

confidence: 99%

Stator elements optimization of centrifugal compressor intermediate type stage by CFD methods

2020

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“…Gas cooling turboexpander units operate at pipelines year-round in the permafrost areas [1]. Turboexpanders [2] are also widely used as sources of refrigeration in industrial processes such as the extraction of ethane and natural-gas liquids (NGLs) from natural gas. Some important features of the compressors are presented below:…”

Section: Introductionmentioning

confidence: 99%

The simulation of gas-dynamic characteristics of centrifugal compressors in turbo-expander units

et al. 2019

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Prof. Y. Galerkin and his team have developed and completed designs of 19 single-stage centrifugal compressors for turbo-expander packaged units applying Universal Modeling Method for the company "Turbokholod JSC" since 2005. The most powerful compressor is 6500 kW. The highest delivery pressure is 12 MPa. One hundred fifteen turbo-expander packaged units with total capacity 400 000 kW were manufactured, installed and were in operation in December 2018. The gas-dynamic characteristics of compressors comply with technical specification when operated within given range of initial temperatures and initial and final pressures -up to 16 combinations for some compressors. The dimensionless characteristics of the compressor stages vary within the range of design parameters: flow rate coefficient 0.0278-0.0697, loading factor 0.43-0.71. The simulation of gas-dynamic characteristics of one of the designed compressors by the newest version of mathematical model is presented as an example, demonstrating the simulation features and effectiveness.

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Creating model stages of centrifugal compressor based on experimental data

Galerkin

Semenovskiy

Soldatova

2019

NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech

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The analysis of design and measured gas-dynamic characteristics of the centrifugal compressor within turboexpander aggregate

Cited by 8 publications

References 4 publications

Stator elements optimization of centrifugal compressor intermediate type stage by CFD methods

Stator elements optimization of centrifugal compressor intermediate type stage by CFD methods

The simulation of gas-dynamic characteristics of centrifugal compressors in turbo-expander units

Creating model stages of centrifugal compressor based on experimental data

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