The task of validation of gas-dynamic characteristics of a multistage centrifugal compressor for a natural gas booster compressor station

2017 ◽  
Author(s):  
A. M. Danilishin ◽  
Y. V. Kozhukhov ◽  
V. V. Neverov ◽  
K. G. Malev ◽  
Y. R. Mironov
Keyword(s):  
Natural Gas ◽  
Centrifugal Compressor ◽  
Dynamic Characteristics ◽  
Compressor Station ◽  
Gas Dynamic ◽  
Booster Compressor ◽  
Multistage Centrifugal Compressor

scholarly journals Gazdynamic characteristics of the centrifugal compressor calculation

2018 ◽  
Vol 54 (4) ◽  
pp. 4-10
Author(s):  
M. Kalinkevych ◽  
V. Ihnatenko
Keyword(s):  
Experimental Data ◽  
Centrifugal Compressor ◽  
Dynamic Characteristics ◽  
Equations Of State ◽  
Element Analysis ◽  
Impeller Blade ◽  
Conservation Of Energy ◽  
Generalized Characteristics ◽  
Gas Dynamic ◽  
The Individual

Gas-dynamic characteristics of the compressor make it possible to evaluate its energy and economic properties, to predict the values of capacity, the generated gas pressure and the power consumption during the compressor operation. For more in-depth consideration of the compressor, it is desirable to have the characteristics of its individual stages. The element-by-element analysis of the characteristics of each stage makes it possible to improve the coordination of the operation of the individual elements with each other and thereby improve the gas-dynamic characteristics of the compressor. The loss factor and the static pressure recovery factor can be used as the values characterizing the properties of the individual elements of the stage. Coefficients are suitable for evaluating the energy properties of any element of the stage. To assess the effect of the element in question on the economy of the stage, it is necessary to establish what proportion of the work required for compression is the "loss" of energy in a given element, i.e. find the reduction in efficiency stage due to dissipation of energy into heat in this element. Calculation of performance of the centrifugal compressor is performed from the inlet to the outlet using the equations of state, of process, of continuity and conservation of energy. The initial data are geometric parameters of the compressor, the composition and the initial parameters of compressed gas, the rotational speed of the rotor. The basis of the elementwise calculation of gas-dynamic characteristics is the gas-dynamic characteristics of the stage elements. The calculation can be performed using the characteristics of the stage elements taken from the own bank of experimental data or using the generalized characteristics of the stage elements. To obtain generalized characteristics of the impeller, blade and no-blade diffusers, reverse guide vanes, experimental data were used, published in the works of Galerkin, Den, Rees, Seleznev and others, as well as experimental data obtained by the author. The generalized characteristics are obtained in the form of analytical dependences of the loss coefficients on the angles of attack or flow angles by approximation of experimental data. These dependences were used to analyze the gas-dynamic characteristics of a centrifugal compressor, which made it possible to develop recommendations for their improvement.

CFD-model of Vaneless Diffuser of Centrifugal Compressor

2021 ◽  
pp. 109-130
Author(s):  
О.А. Solovyeva ◽  
А.А. Drozdov ◽  
E.Yu. Popova ◽  
K.V. Soldatova
Keyword(s):  
Mathematical Model ◽  
Centrifugal Compressor ◽  
Dynamic Characteristics ◽  
Modeling Method ◽  
Relative Width ◽  
Vaneless Diffuser ◽  
Flow Angle ◽  
Flow Parameters ◽  
Gas Dynamic ◽  
Vaneless Diffusers

The centrifugal compressor design involves the use of approximate engineering techniques based on mathematical modeling. One of such techniques is the universal modeling method, which proves to be practically applicable. Having generalized a series of CFD calculations, we used a mathematical model in the latest version of the compressor model to calculate flow parameters in vaneless diffusers. The diffuser model was identified based on the results of experimental studies of average-flow model stages carried out at SPbPU. The model is also used to calculate Clark low-flow centrifugal compressor stages with narrow diffusers with a relative width in the range of 0.5--2.0 %. For these stages, the developed mathematical model showed insufficient efficiency, since the dimensions of the diffusers go beyond the limits of its applicability. To solve this problem, we calculated a series of vaneless diffusers with a relative width in the range of 0.6--1.2 % in the ANSYS CFX software package. Relying on the results of CFD calculations, we plotted the gas dynamic characteristics of the loss coefficients and changes in the flow angle depending on the flow angle at the inlet to the vaneless diffuser. To process the calculated data, the method of regression analysis was applied, with the help of which a system of algebraic equations was developed that connects geometric, gas-dynamic parameters and similarity criteria. The obtained equations are included in a new mathematical model of the universal modeling method for calculating the flow parameters of vaneless diffusers. Comparison of the calculated gas-dynamic characteristics according to the new model with experimental data showed the average error of modeling the calculated (maximum) efficiency equal to 1.08 %

Design Stage Acoustic Analysis of Natural Gas Piping Systems in Centrifugal Compressor Stations

1991 ◽  
Author(s):  
L. E. (Larry) Rogers
Keyword(s):  
Natural Gas ◽  
Centrifugal Compressor ◽  
Mechanical Response ◽  
Acoustic Analysis ◽  
Design Stage ◽  
Compressor Station ◽  
Piping Systems ◽  
Calculation Procedures

This paper presents design stage methods to acoustically analyze centrifugal compressor station piping. The methods have been successfully applied to the design of 26 stations since 1988. Full details of the calculation procedures are given, as well as guidelines for interpreting predicted results. Finally, the relationships between acoustical and mechanical response are described.

The Performance of Portable Evacuation Compressors in Gas Transmission Service

1981 ◽  
Author(s):  
A. R. Hladun ◽  
F. Wong ◽  
S. A. Dunn
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Energy Conservation ◽  
Gas Turbine ◽  
Centrifugal Compressor ◽  
Compressor Station ◽  
Operating Characteristics ◽  
Conservation Program ◽  
Line Section ◽  
Set Up

As part of an extensive energy conservation program, Nova, an Alberta Corporation has purchased a portable evacuation or pulldown compressor. This unit can save much of the natural gas that was previously vented to atmosphere when sections of line were shut down for construction, maintenance or repair. In December, 1979 the company placed into service a 3000-kW pulldown package based upon an eight-stage intercooled centrifugal compressor powered by a two-shaft gas turbine. The unit is a complete trailer-mounted compressor station that can be set-up at a pipeline block-valve in only 4 hr. The pulldown can evacuate the isolated line section down to 1/5 of the original pressure, thereby saving some 75 percent of the high pressure gas. This paper will examine the advantageous economics of the pulldown compressor as well as outline its salient design and operating characteristics.

Determining the actual gas-dynamic characteristics of centrifugal natural gas compressors

2006 ◽  
Vol 42 (1-2) ◽  
pp. 46-50
Author(s):  
G. A. Bykov ◽  
O. G. Bykova ◽  
S. V. Izbash ◽  
V. V. Talpash
Keyword(s):  
Natural Gas ◽  
Dynamic Characteristics ◽  
Gas Dynamic

Design Stage Acoustic Analysis of Natural Gas Piping Systems in Centrifugal Compressor Stations

1992 ◽  
Vol 114 (4) ◽  
pp. 727-736 ◽  
Author(s):  
L. E. Rogers
Keyword(s):  
Natural Gas ◽  
Centrifugal Compressor ◽  
Mechanical Response ◽  
Acoustic Analysis ◽  
Design Stage ◽  
Compressor Station ◽  
Piping Systems ◽  
Calculation Procedures

This paper presents design stage methods to analyze centrifugal compressor station piping acoustically. The methods have been successfully applied to the design of 26 stations since 1988. Full details of the calculation procedures are given, as well as guidelines for interpreting predicted results. Finally, the relationships between acoustic and mechanical response are described.

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