Influence of Liquid Fuel Parameters on Neutral Stability Boundaries of Laminar Premixed Spray Flames

2003 ◽  
Author(s):  
J. Barry Greenberg
Keyword(s):  
Liquid Fuel ◽  
Neutral Stability ◽  
Stability Boundaries ◽  
Spray Flames

scholarly journals Effects of liquid fuel/wall interaction on thermoacoustic instabilities in swirling spray flames

2020 ◽  
Vol 219 ◽  
pp. 86-101 ◽  
Author(s):  
E. Lo Schiavo ◽  
D. Laera ◽  
E. Riber ◽  
L. Gicquel ◽  
T. Poinsot
Keyword(s):  
Liquid Fuel ◽  
Thermoacoustic Instabilities ◽  
Spray Flames ◽  
Wall Interaction

Effects of Droplet Size and Air Preheating on Soot Formation in Turbulent Combustion of Liquid Fuel

2010 ◽  
Author(s):  
Amirmahdi Ghasemi ◽  
Mohammad Moghiman ◽  
Seyed Mohammad Javadi ◽  
Naseh Hosseini
Keyword(s):  
Droplet Size ◽  
Liquid Fuel ◽  
Soot Formation ◽  
Control Volume ◽  
Combustion Model ◽  
Inlet Temperature ◽  
Soot Emission ◽  
Fuel Droplet ◽  
Air Inlet ◽  
Spray Flames

The present study is concerned with the effect of fuel droplet size, air inlet preheating and air swirl number on complex soot process in a turbulent liquid-fuelled combustor. A hybrid Eulerian-Lagrangian method is employed to model the reactive flow-field inside the combustor. Equations governing the gas phase are solved by a control volume based semi-implicit iterative procedure while the time-dependent differential equations for each sizes of the fuel droplets are integrated by a semi-analytic method. The processes leading to soot consist of both formation and combustion. Soot formation is simulated using a two-step model while a finite rate combustion model with eddy dissipation concept is implemented for soot combustion. Also, mathematical models for turbulence, combustion, and radiation are used to take account the effects of these processes. Results reveal the significant influence of liquid fuel droplet size, air inlet temperatures and swirl numbers on soot emission from turbulent spray flames. The predictions show that reduction of spray droplet size and increases of air inlet temperature and swirl numbers considerably, increases soot emission from spray flames.

Effects of Nozzle Orientation on the Structure and Emissions of Spray Flames

1993 ◽  
Vol 115 (3) ◽  
pp. 183-189 ◽  
Author(s):  
A. V. Madanahalli ◽  
S. R. Gollahalli
Keyword(s):  
Liquid Fuel ◽  
Orientation Angle ◽  
Combustion Products ◽  
Flame Length ◽  
Radiation Emission ◽  
Spray Flames ◽  
Air Stream ◽  
Air Streams ◽  
Nozzle Orientation ◽  
Fuel Stream

An experimental study of the effects of the orientation of the liquid fuel stream relative to the air stream from a twin fluid atomizer located in an open-jet wind tunnel is presented. The orientation angle was set at 0 (concurrent), 45, 90, 135, and 180 deg (directly opposed). At 45 and 90 deg, the flame length, the radiation emission, and the concentrations of carbon monoxide, carbon dioxide, nitric oxide, and soot are higher than those at co-flow conditions. At 135 deg, all these quantities decrease markedly from their values at 90 deg and again increase when the fuel and air streams are directly opposed (180 deg). These changes are discussed in terms of the influx of air and recirculation of combustion products into the salient zones of the flame.

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