Combustion and reaction

Sensitivity Analysis of Pollutants and Pattern Factor in a Gas Turbine Model Combustor due to Changes in Stabilizing Jets Characteristics#br#

  • BAZDIDI-TEHRANI Farzad ,
  • TEYMOORI Alireza ,
  • GHIYASI Mehdi
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  • School of Mechanical Engineering, Iran University of Science and Technology, Tehran 16846-13114, Iran

Online published: 2023-12-01

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

Abstract

In the present paper, a sensitivity analysis of pollutants and pattern factor in a model combustor due to changes in the geometrical characteristics of stabilizing jets has been carried out. The exhaust pollutants including NOx, CO and soot have been chosen due to their harmful effect on the environment. The pattern factor has been also considered owing to its impact on turbine blades. The geometrical characteristics comprise diameter, angle and position of stabilizing jets. Eulerian-Lagrangian approach has been employed to model liquid fuel injection and distribution, breakup and evaporation of droplets. For the analysis of reactive-spray flow characteristics, RANS approach, realizable k-ε turbulence model, discrete ordinates radiative heat transfer model and steady flamelet combustion model together with the chemical reaction mechanism of diesel fuel (C10H22) have been applied. NOx modeling has been performed via post-processing. Sensitivity analysis is such that by making variations in the problem inputs (diameter, angle and position of jets) in an organized manner, the effects on the outputs (NOx, CO, soot and pattern factor) are predicted. The number and order of simulations are predicted by design of experiments and full factorial model. Results have been analyzed using analysis of variance. It has been observed that if interactions among the characteristics of jets are considered, it is possible to analyze the exhaust pollutants more accurately. In fact, by using the interactions, it is likely to find a point where all output parameters are improved. Results show that by considering interactions of stabilizing jet characteristics, the maximum values of NOx, CO, soot and pattern factor change from 13.927 ppm, 11.198% mole fraction, 2.877 ppm and 0.043 to 26.233 ppm, 14.693% mole fraction, 142.357 ppm and 0.060, respectively. Furthermore, the minimum values change from 5.819 ppm, 7.568% mole fraction, 0.013 ppm and 0.029 to 6.098 ppm, 5.987% mole fraction, 0.002 ppm and 0.027, respectively.

Cite this article

BAZDIDI-TEHRANI Farzad , TEYMOORI Alireza , GHIYASI Mehdi . Sensitivity Analysis of Pollutants and Pattern Factor in a Gas Turbine Model Combustor due to Changes in Stabilizing Jets Characteristics#br#[J]. Journal of Thermal Science, 2022 , 31(5) : 1622 -1641 . DOI: 10.1007/s11630-022-1647-0

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