선회유동을 가지는 연료분무에서 공연비변화가 분무거동에 미치는 영향에 관한 연구

Abstract

The effects of swirl flow on the fuel spray characteristics were investigated under various air and fuel supply conditions through measurements of velocity, spray characteristics using APV(Adaptive Phase/Doppler Velocimetry) in a gas turbine combustor fuel module system. The flow and spray characteristics such as structure of recirculation region, intensity of swirl flows, spray particle size, volume flux and number density were examined when swirl flow was induced by frontal devices. It was found that the mass increase of air supply toward center of the swirl flow is observed at downstream while the structure and size of recirculation has no change as the mass of supply air increase. Smaller fuel droplets were observed in the main axial stream and inside the recirculation zone when air supply increased. The interaction of air/fuel ration and particle size coincide with SMD - We number relation