EXPERIMENTAL STUDY OF PASSIVE SCALAR DIFFUSION IN GRID TURBULENCE WITH CONTRACTION
收缩湍流场中标量扩散的实验研究

We use a contraction in the grid turbulence to get non-isotropic turbulence. We have studied the thermal mixing layer and thermal wake in the grid turbulence with a contraction. The experiment results show that the mixing layer and wake were compressed in the contraction section, then they were expanding continuously. Their profiles of the T, and have similarity in the experimental region.