关键词: 黏性物系, 气液两相流, 搅拌槽, 分散特性

Abstract: Research progress of air hold-up，bubble size distribution and gas-liquid mass transfer in stirred vessel with viscous fluid were summarized from the perspective of experiment and simulation. The influences of impeller，operating conditions，viscosity or non-Newtonian characteristics on gas dispersion were discussed. The combination of radical-flow impellers and up-pumping axial impellers could decrease the scale of air cavitation，and was suitable for low viscosity and moderately viscous fluids. The influence of agitation speed was more significant than air inflation rate. With increasing agitation speed，uniformity of bubble distribution became better. Increasing air inflation rate enhanced air hold-up occupied by big bubbles. The non-uniformity of air distribution became worse. Increasing viscosity or non-Newtonian capacity changed the rate of collision of bubbles，making mean bubble size smaller. Correction of computational model for viscous fluids was presented and the direction of future research was prospected.

Key words: viscous fluid, gas-liquid flow, stirred vessel, dispersion