抄録
In the present study, the flow over a backward-facing step has been investigated experimentally. The relative stepheight to boundary layer thickness of an incoming flow are H/δ_0 = 0.63, and the momentum thickness Reynoldsnumber is 3000. Mean and fluctuating velocity distributions were measured by the flying hot-wire technique with Itypesingle probe and multiple probe rake, respectively. Proper orthogonal decomposition was employed to analyzespatial structures behind the step. Distributions of eigenvector and POD spectra were calculated, and joint probabilitydensity function and cross correlation coefficient between the POD coefficients of the first and second mode.
