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Title: Development and validation of a new soot formation model for gas turbine combustor simulations

In this paper a new soot formation model for gas turbine combustor simulations is presented. A sectional approach for the description of Polycyclic Aromatic Hydrocarbons (PAHs) and a two-equation model for soot particle dynamics are introduced. By including the PAH chemistry the formulation becomes more general in that the soot formation is neither directly linked to the fuel nor to C{sub 2}-like species, as it is the case in simpler soot models currently available for CFD applications. At the same time, the sectional approach for the PAHs keeps the required computational resources low if compared to models based on a detailed description of the PAH kinetics. These features of the new model allow an accurate yet affordable calculation of soot in complex gas turbine combustion chambers. A careful model validation will be presented for diffusion and partially premixed flames. Fuels ranging from methane to kerosene are investigated. Thus, flames with different sooting characteristics are covered. An excellent agreement with experimental data is achieved for all configurations investigated. A fundamental feature of the new model is that with a single set of constants it is able to accurately describe the soot dynamics of different fuels at different operating conditions. (author)
Authors:
; ;  [1]
  1. DLR - German Aerospace Centre, Pfaffenwaldring, 38-40, 70659 Stuttgart (Germany)
Publication Date:
OSTI Identifier:
21262163
Resource Type:
Journal Article
Resource Relation:
Journal Name: Combustion and Flame; Journal Volume: 157; Journal Issue: 2; Other Information: Elsevier Ltd. All rights reserved
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; KEROSENE; GAS TURBINES; POLYCYCLIC AROMATIC HYDROCARBONS; SOOT; VALIDATION; FLAMES; METHANE; SIMULATION; SYNTHESIS; DIFFUSION; COMBUSTION CHAMBERS; KINETICS PAH sectional approach; Finite-rate chemistry; Diffusion flames; Partially premixed flames