Abstract
The axial cross section images of seeded air jet were taken using Nd : YAG Laser. Based on concentration fluctuation of these images, concentration integral scales were calculated and compared with velocity integral scales calculated from streamwise velocity fluctuation measured by particle image velocimetry. Longitudinal concentration integral scale Lcs is a little smaller than lateral concentration integral scale Lcr on the axis within the region that it was measured (s/D<54), Lcs=Lcr where r/s=0.006 and Lcs>Lcr where r/s>0.006.
