JOINT INVESTIGATION OF ROTATING FLOW WITH VORTEX BREAKDOWN USING CFD, VISUALIZATION AND LDV

Vortex breakdown of the steady axisymmetic rotating flow in a confined cylindric al container with a rotating endwall was numerically and experimentally studied. High-quality precision-controlled turntable facilities were established at S hanghai Jiaotong University and Tokyo Denki University independently. Collabor ative investigations of vortex breakdown were carried out using CFD, Laser Doppl er Velocimetry (LDV) and streakline visualization, respectively. The characteri stics of vortex breakdown were delineated in terms of comparative investigation using numerical and experimental results. SIMPLEC scheme and FMG multigrid was applied to numerical simulation. Numerical simulation was extensively compared with streakline visualization and LDV measurements, showing qualitative and quan titative agreements.