ID 272

Characterization and Dynamics of Spray Flow Field in Gas Turbine Swirl Cup

 

Abstract:

In this study, time-resolved PIV measurements have been employed to understand the complex flow dynamics in the gas turbine swirl cup. The tested geometry includes twin radial entry vane swirler and centrally mounted hollow cone fuel injector. Experiments are carried out with both co and counter rotation of swirl flow across the two-radial entry swirlers. In addition, the flare angle at the exit of swirl cup also varied. Essentially, the main aim of this study is to identify how the flow orientation (co/counter rotation) and flare angle influences the global evolution and dynamics of the flow field at the swirler exit. The most dominant energetic and dynamic modes governing the injector flow field is meticulously analyzed with help of proper orthogonal and dynamic mode decomposition (POD, DMD) tools.