Experimental Investigation of Dual-Fuel Combustion Characteristics inside a Gas Turbine Combustor

Abstract

This paper represents an experimental study to improve the spray combustion by using dual fuel (diesel and N.G. fuels) combustion. A burner head is designed to be suitable for burning dual fuel together. The burner head was fitted coaxially with a water-cooled combustor of 0.2 m inner diameter and 1 m in length. The flame characteristics of dual fuel (diesel and N.G.) in which the natural gas, with and without swirl, is added into the combustion chamber with different thermal heat percentages of 5, 10, 15, and 20 % of the total thermal load. The experimental results show that, increasing the natural gas thermal heat percentage when the N.G. used with and without swirl, leads to increase high temperatures region size while to decrease the flame length. The NOx and CO2 concentrations increase but CO and O2 concentrations decrease at the same operating conditions. The effect of using N.G. with swirl has stronger effect than that of without one. The flame size in its diameter and length is larger for N.G. with swirl than that of without one.