Development of Method and Computer Program for Multistage Axial Compressor Design: Part II — Two-Dimensional Design and Validation Using CFD

Wseas Transactions on Applied and Theoretical Mechanics

Popov

et al. 2020

Published data on flat grid purges allow to evaluate the efficiency of blade devices with different kinematic scheme of stages and design parameters. The authors present the main provisions of the calculation program algorithm and some results of numerical analysis of the efficiency of flat grids of axial stages with different combinations of design parameters. The content of the article and the computer program are addressed to people who are improving their knowledge of gas dynamics of axial compressors. Some of the results may be of interest to specialists working professionally in this field.

Section: Literature Reviewmentioning

confidence: 99%

Analysis of the Efficiency of Elementary Grids of Axial Compressors Based on the Data of Flat Grid Purges

Wseas Transactions on Applied and Theoretical Mechanics

Popov

et al. 2020

“…The works [35], [36] present the development of a software package for the optimization of size and form of axial compressors. The developed mathematical model takes into account various components of head losses in axial compressors and allows optimizing their dimensions, formulas of impeller and guiding device vanes, and provides predicted gas-dynamic characteristics of the compressor.…”

Section: Literature Reviewmentioning

confidence: 99%

Methodology and Experience of Primary Design of a Transonic Axial Compressor

Wseas Transactions on Systems and Control

Solovieva

et al. 2020

The work presents the main provisions underlying the program for axial compressors calculation anddesign. The calculation of head losses and grids deflection capacity is based on the formulas of A. Komarov. Themodel contains empirical coefficients, values of which are selected during verification of the program based onthe tests results of multistage compressors and compressor stages. The main equations and algorithm for pressuresand velocities calculation under the radial equilibrium condition are presented. The use of computer programsbased on these models in the design of a 4-stage gas turbine engine compressor of moderate power with a totalpressure ratio of 3.2 and a given velocity is shown. For the first compressor stage, two variants with differentflow coefficients were compared. Variant #1 is designed with the classic recommendation to approach the samemechanical gas energy at the exit of the stage along the radius. Variant #2 is designed for a smaller flowcoefficient, but in order to ensure radial equilibrium, it was necessary to introduce a significant unevenness ofmechanical energy supply along the radius. Due to the lower kinetic energy, variant 2 has a 1.9% higher stageefficiency. Despite the fact that the loss coefficients of the blade devices are lower for variant #1. The questionremains as to how much the unavoidable mixing losses of variant #2 will reduce its efficiency in the process ofgas mechanical energy equalizing.

“…A number of specific design issues have been solved by domestic researchers and described in a number of publications, for example, in [7]. The works [8], [9] present the development of a software package for the optimization of size and form of axial compressors. The developed mathematical model takes into account various components of head losses in axial compressors and allows optimizing their dimensions, impeller and guiding device blades form, and provides predicted gas-dynamic characteristics of the compressor.…”

Section: Literature Reviewmentioning

confidence: 99%

Computational Analysis of Axial Compressor Stages Characteristics

Wseas Transactions on Applied and Theoretical Mechanics

Popov

et al. 2020

Published data on flat grid purges allow to evaluate the efficiency of blade devices with different kinematic scheme of stages and design parameters. The corresponding computer program ODOS-GP04 and examples of numerical analysis of the efficiency of flat grids and spatial blade devices of axial stages with different combinations of design parameters was provided. Further development of the ODOS-GP04 program is described below, which makes it possible to perform an estimated calculation of the gas-dynamic characteristics of the stages designed using this program. Analysis of the calculated characteristics of a number of typical stages allows to draw a conclusion about the influence of the main design parameters. This article is primarily addressed to people who are developing their knowledge of the gas dynamics of axial compressors. Some results of calculations do not correspond to the published experimental data. The authors expect that this may attract the attention of specialists working in the field of gas dynamics of axial compressors.