Effect of Low Ambient Pressure on Spray Cone Angle of Pressure Swirl Atomizer

Pressure swirl atomizers are widely used in gas turbine combustor; this paper is aimed at researching the effect of low ambient pressure (0.1 MPa to 0.01 MPa, lower than an atmosphere) on spray cone angle atomizer. The captured by high-speed photography; then, image post program process magnitude. A mathematical model a single droplet’s movement and trajectory based force analysis proposed validate variation. maximum variation angle, which observed when fuel supply drop through atomizer 1 as decreases from 0.1 found be 23.9%. experimental results show that expected increase with decrease; meanwhile, agree well trend.