Wpływ dyskretyzacji układu przepływowego turbiny parowej na wyniki symulacji procesów nieustalonych

Nikołaj Uzunow

Abstract

The aim of the doctor thesis was to investigate the influence of the steam turbine flow path discretisation on the results from its transient performance simulation. The thermal-flow processes, taking place in a heat turbine, and their models were classified. The main limitations in applying the particular model classes were defined. A discrete model of a complex steam turbine was developed: main assumptions, full mathematical description and solving methods were presented. An author's computer simulation programme, basing on that model, was used for investigation on the 13K215 turbine accumulation properties and their influence on the course of dynamic processes, introduced by different disturbances. The abilities of reducing the number of state co-ordinates (number of equations in the dynamic part of the model) in order to accelerate the cal culations were investigated. A simple, universal criterion was defined for determining the opitimal degree, of freedom of such a model during its building Basic assumptions and mathematical description of an one-dimensional model of flow through a turbine palisade were also presented. Preliminary analysis of the model applicability was made; the difficulties, connected with the flow through the rotating parts, were discussed.
Diploma typeDoctor of Philosophy
Author Nikołaj Uzunow (FPAE / IHE)
Nikołaj Uzunow,,
- The Institute of Heat Engineering
Title in PolishWpływ dyskretyzacji układu przepływowego turbiny parowej na wyniki symulacji procesów nieustalonych
Languagepl polski
Certifying UnitFaculty of Power and Aeronautical Engineering (FPAE)
Disciplineenergetics / (technology domain) / (technological sciences)
Defense Date05-11-2001
Supervisor Janusz Lewandowski (FPAE / IHE)
Janusz Lewandowski,,
- The Institute of Heat Engineering

Pages119
Keywords in Polishturbiny parowe, modele matematyczne, symulacja komputerowa
Abstract in EnglishThe aim of the doctor thesis was to investigate the influence of the steam turbine flow path discretisation on the results from its transient performance simulation. The thermal-flow processes, taking place in a heat turbine, and their models were classified. The main limitations in applying the particular model classes were defined. A discrete model of a complex steam turbine was developed: main assumptions, full mathematical description and solving methods were presented. An author's computer simulation programme, basing on that model, was used for investigation on the 13K215 turbine accumulation properties and their influence on the course of dynamic processes, introduced by different disturbances. The abilities of reducing the number of state co-ordinates (number of equations in the dynamic part of the model) in order to accelerate the cal culations were investigated. A simple, universal criterion was defined for determining the opitimal degree, of freedom of such a model during its building Basic assumptions and mathematical description of an one-dimensional model of flow through a turbine palisade were also presented. Preliminary analysis of the model applicability was made; the difficulties, connected with the flow through the rotating parts, were discussed.
Thesis file
Uzunow_Nikolaj_wplyw.pdf 2.88 MB
Citation count*4 (2015-07-23)

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