液相軸対称噴流における高シュミット数物質混合のレイノルズ数依存性

抄録

To investigate the effect of Reynolds number on high Schmidt number scalar statistics, we measured the dye concentration fluctuation in liquid phase turbulent axisymmetric jet for various Reynolds numbers. The dye concentration fluctuations were measured by LIF method using the optical fiber probe with a high spatial resolution of 2.5 μm, which is equivalent to the minimum scale of concentration fluctuations. It was found that the concentration fluctuation power spectrum shows the -1 power law in the high wavenumber region regardless of Reynolds number. It was also shown that the relative concentration fluctuation intensity on the jet central axis does not depend on Reynolds numbers at high Reynolds numbers.