الفهرس 
Effect of Air to Liquid Mass Ratio (ALR)Only 14 pages are availabe for public view
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Abstract
Atomization of liquid fuel has a vital role in various combustion applications including gas turbines. The efficiency and effectiveness of any liquid fuel system relies on how finely it is able to atomize fuel. An inefficient fuel atomization system will require larger amounts of fuel to achieve the required power while releasing more pollution emissions which will negatively impact air quality and the environment.
The present work is devoted to study numerically the effect of liquid fuel (Kerosene) atomization on spray and combustion characteristics inside a three dimensional gas turbine combustor model. The present work is divided into two main sections as following:
The first section is divided into two parts, the first part is related to investigate the effect of changing atomizing air to liquid fuel mass ratio (ALR) on spray characteristics using air blast atomizer without combustion where eight values (0.3, 0.5, 0.7, 0.9, 1, 1.2, 1.4 and 1.5) are used, Kerosene is used as a fuel at constant mass flow rate of 2 g/s. The second part is related to study the effect of changing ALR on combustion characteristics using air blast atomizer inside a swirl combustor tube at different swirl numbers of 0.5, 0.87 and 1.
The second section studies the effect of changing the atomizing gas type using gas-blast atomizer at constant air swirl number, S, of 0.5. Seven atomizing gases are used and these include (air, ammonia, hydrogen, natural gas, superheated steam, oxygen and nitrogen). A combustion air mass flow rate of 75 g/s is considered while the Kerosene fuel mass flow rate is varied to achieve constant thermal load of 86 KW through all tests.
The numerical simulation of a non-premixed Kerosene flame has been performed in a three dimensional combustor model. CFD studies were carried out using ANSYS FLUENT 14.5 code. The flow field is simulated using the SST k-ω turbulence model, the atomization of the liquid Kerosene is simulated using the discrete phase model (DPM) and the reacting flow is simulated by the non-premixed combustion model.