Numerical Analysis and Empirical Correlations to Predict SMD of Pressure Swirl Atomizer for Small Scale Gas Turbine Combustion Chamber

摘要

The use of Small Gas Turbine to meet on-site small-scale energy demand offers a great opportunity for preliminary energy saving and reduction of pollutant and greenhouse emissions. The properly designed atomizer can reduce emission and impart flame stability. The Sauter mean diameter of atomizer plays an important role in the combustion chamber performance. There are number of empirical and semi empirical equations are developed to find Sauter mean diameter of the spray from pressure swirl atomizer. In the present work numerical simulation of pressure swirl atomizer for small scale gas turbine combustion chamber is carried out using ANSYS Fluent and SSD model is selected as secondary droplet breakup model. The effect of injection pressure on the Sauter mean diameter is studied and the results are compared with empirical correlations available in literature.