In order to study the flow field characteristics downstream a double-swirler outlet

four double-swirler configurations with different misaligned dimensions (0

0.5

1.0

1.7mm) were designed. The no-reacting flow field of different misaligned dimensions was obtained by PIV. Expermental result shows that there is no significant difference in the flow field between misaligned dimension of 0mm and 0.5mm. In the configurations of misaligned dimension larger than 0.5mm

the double-vortex construction and the central recirculation zone downstream the double-swirler outlet become asymmetrical and narrow respectively. The flow filed show obvious deviation from the one of 0mm misaligned dimension. Misalignment has a pronounced influence on the radial velocity profile downstream the double-swirler outlet. The radial velocity around the axial location of X/D=0.5 is converted into peak and positive value when misaligned dimension is larger than 0.5mm.