Variations of Spray Cone Angle and Penetration Length of Pressure Swirl Atomizer Designed For Micro Gas Turbine Engine

The pressure swirl atomizer has attracted attention of many researchers and has been the subject of considerable theoretical and experimental studies. However, despite these efforts our knowledge is unsatisfactory. The physics is not well understood, the available data and correlations are of questionable validity and there is little agreement between various investigators at to exact relationship between liquid properties, nozzle dimensions and spray characterization. An attempt has been made herein to experimentally investigate pressure swirl atomizer designed for tubular type combustion chamber for micro gas turbine engine. The experimental investigations suggest that spray half cone angle tends to decrease with increase in injection pressure. This is expected as atomization improves with increase in the injection pressure differential. The decrease in spray cone angle has led to the increase in penetration length with increase in injection pressure.