NUMERICAL ANALYSIS OF TEMPERATURE DISTRIBUTION IN COMBUSTORS CONSIDERING DIFFERENT CONDITIONS

A numerical analysis to study the temperature distribution along to combustor-transition piece system applying computational fluid dynamics, is presented. Two cases are studied; the first considers the variation of N2 in the fuel composition identifying the effect of hot streak on temperature distri...

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Bibliographic Details
Published inJournal of Magnetohydrodynamics and Plasma Research Vol. 21; no. 4; pp. 425 - 443
Main Authors Gallegos-Muñoz, A, Alfaro-Ayala, J A, Belman-Flores, J M
Format Journal Article
LanguageEnglish
Published Hauppauge Nova Science Publishers, Inc 01.10.2016
Subjects
Calorific value
Combustion chambers
Composition effects
Computational fluid dynamics
Fluid dynamics
Fluid flow
Fuels
Gas turbine engines
Gas turbines
Inlet temperature
Kinetics
Mathematical models
Numerical analysis
Organic chemistry
Temperature
Temperature distribution
Vanes
Velocity coupling
Velocity distribution
England
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Summary:A numerical analysis to study the temperature distribution along to combustor-transition piece system applying computational fluid dynamics, is presented. Two cases are studied; the first considers the variation of N2 in the fuel composition identifying the effect of hot streak on temperature distribution at the input of the first stage of vanes and blades of the gas turbine. The second case study the effect of fuel on the inlet temperature to the turbine (TIT) due to the hot streak through the transition piece. In both cases, the k-e turbulence model and chemical equilibrium for the combustion process are applied, the pressure-velocity coupling was solved using a SIMPLE approach and all equations by first-order upwind scheme. The evolution of the combustion systems in the gas turbines has been oriented towards the continuous desire to obtain higher temperatures, greater power and minimal emissions to the environment, however, the design of the combustor-transition piece and the fuel composition influence over the temperature and velocity distribution. According to results, when the nitrogen is increased in the composition of the fuel, the temperatures decrease and the hot streak is reduced along of the transition piece and the NOx formation reduces too. This is to be expected due to the nitrogen absorbs some of the heat released in the combustion process and the temperature reduces significantly. When the calorific value of the fuel is lower, it is necessary to increase the amount of fuel to maintain power turbine because the temperature at the turbine inlet (TIT) reduces, however, it can cause some damage in the first stage of the gas turbine due to the migration of the hot streak.
ISSN:1083-4729