軸対称乱流噴流中の速度・スカラー相関の構造(流体工学, 流体機械)

抄録

The axial velocity, radial velocity and concentration of a high Schmidt number matter were measured simultaneously in an axisymmetric turbulent jet. The diffusing fluid is a water solution of the commercial dye (Schmidt number Sc≃3800), and an issuing Reynolds number is 6400. A combined probe of a fiber optic concentration sensor and a X type hot film was used to measure the axial velocity, radial velocity and concentration simultaneously. Joint pdfs of concentration and radial velocity have symmetries in whole scales on the jet centerline. Correlation vanishing scales of the concentration and radial velocity are smaller than those of the concentration and axial velocity at the region off the jet centerline.