A study on the fluid dynamics of domestic Gas burners

Gattei, Lorenzo (2009) A study on the fluid dynamics of domestic Gas burners, [Dissertation thesis], Alma Mater Studiorum Università di Bologna. Dottorato di ricerca in Disegno e metodi dell'ingegneria industriale, 21 Ciclo. DOI 10.6092/unibo/amsdottorato/1926.
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Domestic gas burners are investigated experimentally and numerically in order to further understand the fluid dynamics processes that drive the cooking appliance performances. In particular, a numerical simulation tool has been developed in order to predict the onset of two flame instabilities which may deteriorate the performances of the burner: the flame back and flame lift. The numerical model has been firstly validated by comparing the simulated flow field with a data set of experimental measurements. A prediction criterion for the flame back instability has been formulated based on isothermal simulations without involving the combustion modelization. This analysis has been verified by a Design Of Experiments investigation performed on different burner prototype geometries. On the contrary, the formulation of a prediction criterion regarding the flame lift instability has required the use of a combustion model in the numerical code. In this analysis, the structure and aerodynamics of the flame generated by a cooking appliance has thus been characterized by experimental and numerical investigations, in which, by varying the flow inlet conditions, the flame behaviour was studied from a stable reference case toward a complete blow-out.

Tipologia del documento
Tesi di dottorato
Gattei, Lorenzo
Dottorato di ricerca
Scuola di dottorato
Ingegneria industriale
Settore disciplinare
Settore concorsuale
Parole chiave
domestic gas burner, partially premixed flame, flame back, flame lift, CFD
Data di discussione
17 Aprile 2009

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