Effect of gas-to-liquid density ratios at different liquid viscosity on the atomization of the air-blast atomizer

摘要

Atomizers are widely used for fuel injection in aircraft engines and gas turbine power plants. Improvement in fuel atomization can lead to the reduction of pollutant emissions resulting from the fuel combustion such as NOx gases. Air-blast atomizers provide excellent atomization over a large range of fuel flow rates and very good patternation. In this study, we consider an annular liquid sheet emanating from an air-blast atomizer subjected to inner and outer swirling air streams. The final dispersion equation is solved numerically using Mathematica. We solve for the root with the maximum imaginary part that represents the maximum growth rate of disturbance corresponding to the most unstable wave number.