The application of modern computational fluid dynamics techniques for increasing the efficiency and stability of an axial compressor in an industrial gas turbine

This paper contains on-site test data of an axial compressor as part of an industrial gas turbine, as well as the process of Computational Fluid Dynamics (CFD) modelling, verification, research and modernization. The research method has been verified with actual test data gathered from the real gas turbine unit (GTU) test. The computational studies showed significant potential for improving aerodynamic efficiency and the surge margin of a compressor by better matching of inlet and outer groups of stages. A special design approach was used to improve aerodynamic parameters of the inlet system and certain middle stages. Computations made for the improved compressor model showed a 3% efficiency gain and 5% stall margin gain with possibilities for further modernization. © 2014 WIT Press.International Journal of Safety and Security Engineering;International Journal of Sustainable Development and Planning;WIT Transactions on Ecology and the Environmen

Multi-criteria optimisation of subsonic axial compressor blading

The novel approach to parametric topology of the 2D compressor airfoil was tested at multi-criteria optimisation problem for high speed subsonic application. Some results regarding the shape of the blade are presented. © 2019 Published under licence by IOP Publishing Ltd.The work was supported by Act 211 Government of the Russian Federation, contract №02.A03.21.0006

Software development of computational fluid dynamic for an Euler equation

In this paperwork, writing an Euler equation’s solver was described. The main purpose of this work is an investigation of mathematical models to solve inviscid and compressible fluid flow in two-dimensional tasks. During this research, I explored how to influence number of CFL and artificial viscosity on an accuracy and a stability of a solution.В данной работе было описано написание программного кода для решения уравнения Эйлера. Целью данной работы являлось получение навыков прикладного использования уравнения механики жидкости и газов, изучение математических моделей решений задач с истечением невязких сжимаемых жидкостей. Были определены влияния искусственной вязкости на соответствие физической картине истечения данных жидкостей. Также был проведен анализ влияния числа Куранта на сходимость расчета

Experimental and calculated research of a double flow in a plane turbine latch under conditions of the stand of the department of "Turbines and engines"

The creation and purging of a nozzle from a flat turbine lattice is considered. This nozzle is calculated in ANSYS CFX. The patterns of velocity distribution and pressure drop graphs along the profile are constructed and analyzed.Рассмотрены создание и продувка насадка с плоской турбинной решетки. Проведен расчет этого насадка в ANSYS CFX. Построены и проанализированы картины распределения скоростей и графики перепадов давления по профилю

Identification of corner separation modelling in axial compressor stage

The paper presents a study of corner separations in hub to blade region at various operation conditions towards compressor stall. It is known that for compressor flows with low or none separations computation fluid dynamics with RANS methods work quite well, however, for highly separated flows they are no longer entirely valid. Therefore, several criteria were applied for prediction and quantification of possible corner separation, and the main interest of this work is in predicting the separation just before it will actually happen by certain flow metrics, so these metrics can be further used as a 'pre-stall' criteria whilst the RANS CFD operating point still behave within its appropriate limits. Also the effect of shear lean is discussed in the presented context. © The Authors, published by EDP Sciences, 2020

On Technical Performance Estimation of a Gas Turbine with Variable Power Turbine Vanes

AbstractThe results of a special methodology design for technical performance of a gas turbine with variable nozzles are presented in the paper. The data are provide for the industrial implementation experience and special heat engineering tests on appropriate machines. The methodology was designed with the use of approximated manufacturer characteristics where dependencies from initial conditions and GT load were adopted

Analysis of strength and vibration characteristics of the first working blades of an axial compressor with rotor groove

В данной работе представлен сравнительный анализ результатов модального и структурного расчетов единичной лопатки первой ступени осевого компрессора и лопатки в сборке с пазом. Произведена верификация частот собственных колебаний. Выявлены зоны локализации интенсивностей напряжений при нагружении центробежными силами для различных конструктивных исполнений лопаточного аппарата турбокомпрессора. Показаны возможности снижения напряжений путем выбора наиболее удачной конструкции.This paper presents a comparative analysis of the results of the modal and structural calculations individual blade of the first stage axial compressor and blade assembly to the groove. Verification of the natural frequencies was produced. Identified areas of localization of the intensities of stresses when loaded by centrifugal forces for various design versions of the blade apparatus of the turbocharger. Shown the possibility of reducing stress by selecting the most successful design

3D-scanning

Рассматривается возможность проведение входного контроля турбинных лопаток с помощью 3D-сканера и возможность проведения реверс-инжиниринга.The possibility of carrying out incoming inspection of turbine blades with the help of 3D-scanner and the possibility of reverse engineering

Development of a mobile compressor station

В работе рассматриваются вопросы разработки компрессорной станции для выкачки газа из магистральных газопроводов при проведении плановых ремонтных работ. Проанализированы варианты компоновки оборудования.The issues of compressor station development for pumping natural gas from the main pipeline during planned repairs are considered in the work. Also equipment arrangement options were analyzed in this work

Redesign of an axial compressor with mass flow reduction of 30%

In this paper redesign process of an axial compressor of a Gas Turbine for mechanical drive is discussed together with computational results and experimental data. The goal of the project was to reduce compressor mass flow by 30% and at the same time to increase compressor specific work by about 10%. This could not be achieved by conventional methods such as re-staggering of Inlet Guide Vanes. Throughflow and CFD calculations were performed for redesigned versions. As a result an updated compressor was produced for the real engine and achieved design objectives. This paper shows how the swept area distribution along the compressor affects stage loading distribution and surge limits. © 2019 WIT Press