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Title: Large eddy simulations of reacting swirling flows in an industrial burner
Author: Bulat, Ghenadie
Awarding Body: Imperial College London
Current Institution: Imperial College London
Date of Award: 2012
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The objective of the present work is to investigate and apply the fully Eulerian stochastic field method in conjunction with LES to an industrially-premixed turbulent reacting flows. This approach has shown promising results in recent studies and is of particular interest for complex geometry applications with flame configurations involving mixed modes of combustion. The relevant characteristics of the swirling flow in gas turbine applications are presented in the first part of the work. Following that, the numerical method is described and the relevant experimental dataset is discussed. The results are presented in two parts: isothermal and reacting flows. The test case of isothermal flows were studied at differing operating conditions. The influence of sub-grid turbulence models has been quantified in complex geometries. Dependencies of the Reynolds number on coherent structures has also been presented. In the reacting flows, the influence of the chemical mechanism and of the sub-grid pdf have been discussed. The formation of emissions inside the combustor chamber concludes the work and provides a contribution to the better understanding of industrial gas turbine combustion. The findings of this work strongly suggest, that the Eulerian stochastic field method is an effective and reliable tool to describe the combustion of complex flow configurations. The full scale case simulations are performed with the same set of model parameters, previously identified for simpler flames, which potentially eliminates the requirement of their adjustment.
Supervisor: Jones, W. P. ; Marquis, A. J. ; Sanderson, V. Sponsor: EPSRC
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available