New generation of universal modeling for centrifugal compressors calculation

Galerkin, Yu. B.; Drozdov, A. A.

doi:10.1088/1757-899x/90/1/012040

Cited by 17 publications

(9 citation statements)

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“…Figure 1 demonstrates that a compressor flow part consists of three types of stages: -suction stage "impeller+diffuser+return channel", -suction stage "impeller+diffuser+exit nozzle". The characteristics' simulation was made by the most modern 8th version of the Universal Modeling Method [2,[7][8][9][10][11][12]. In Table 1 we compare the maximum efficiency obtained through factory testing and by simulating 20 pipe line compressors with different parameters [13].…”

Section: Objects and Results Of Verificationmentioning

confidence: 99%

“…The loading factor T ψ des is the design parameter chosen by the designer. The semi-empirical equations checked by the practice of calculations are used in the Universal Modeling Method [2]:…”

Section: Equations For Main Parameters Of Compressor Candidatesmentioning

confidence: 99%

“…Taking into account the pressure losses in the inlet nozzle, the total pressure * 0 p at the inlet to the 1st stage should be calculated. For candidates with internal coolers pressure loss is taken into account.Iterative process for equations(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)) defines values of des  , that are sufficient to calculate des  by the simplified math model. The results of numerical simulation were compared with experimental data.…”

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confidence: 99%

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Verification of a simplified mathematical model of centrifugal compressor stages

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To calculate the efficiency of a centrifugal compressor, it is sufficient to know the design parameters and similarity criteria: flow rate coefficient, loading factor, relative hub ratio, Mach number. The effect of the inlet nozzle and the diffuser type is also taken into account. The original simplified model was successfully used for calculation of compressors' candidates in computer programs of the Universal Modelling Method. Recently, the model has undergone significant revision and been remade. The modernized model is used in the program for primary design of centrifugal compressors. The authors verified the new model, comparing the calculated efficiency with the measured efficiency of several dozens of model stages 21CV family and low flow rate model stages. In total, calculations were carried out for more than thirty model stages. The range of design parameters of analysed model stages is quite wide: flow rate coefficient 0.00564 -0.0676; loading factor 0.384 -0.742; hub ratio 0.258 -0.466.

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Section: Objects and Results Of Verificationmentioning

confidence: 99%

Section: Equations For Main Parameters Of Compressor Candidatesmentioning

confidence: 99%

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Verification of a simplified mathematical model of centrifugal compressor stages

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“…-the 8th version standard set of empirical coefficients simulate with good accuracy characteristics of the number of model stages with mechanically treated impellers [5,8]. In order to simulate characteristics of the compressor TK-4-530 accurately, the empirical coefficient of the positive incidence losses was increased, -the surface roughness of the cast impeller was adopted as 0.2 mm, of the cast exit nozzle as 0.3 mm, the mechanically treated vane bladder diffuser as 20 μm.…”

Section: Th Version Of the Universal Modeling Methods Math Model Verimentioning

confidence: 99%

“…The designers' experience and intuition led to successful designs in the past. The aim of the work is to prove the new 8th version [8,9] of the math model ability to reflect specific features of the turboexpander unit compressor without individual tuning of the model. Table 1 provides information on compressors after designs of prof. Yu.…”

Section: Introductionmentioning

confidence: 99%

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

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

Rekstin

Semenovskiy

Galerkin

et al. 2018

AIP Conference Proceedings

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New generation of universal modeling for centrifugal compressors calculation

Cited by 17 publications

References 1 publication

Verification of a simplified mathematical model of centrifugal compressor stages

Verification of a simplified mathematical model of centrifugal compressor stages

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

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

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