关键词: 搪玻璃, 搅拌桨, 搅拌特性, 数值模拟

Abstract: This paper used CFD as the simulation method in the investigation of the mixing characteristics of six new types of glass-lined agitators，with the same diameter and different blade angles and blade widths. This research analyzed the effects of baffle and impeller off-bottom-distance on the fluid flow field，and the effects of blade angle and blade width on velocity field. The experimental results of stirring power and mixing time agreed well with the simulation. Comparison with traditional glass-lined pitch blade agitator was also investigated. The results showed that the following：①The stirring effect was optimal with added baffle and the impeller off-bottom-distance was 450 mm；②When blade angle and width increased，axial，radial and tangential velocities increased accordingly，and the mixing effect was optimal when the blade width was 95 mm and blade angle was 45°；③When the rotational speed increased，the stirring power increased and mixing time decreased. The power consumption was lowest when the blade width was 95 mm and blade angle was 30°；the mixing time was shortest when the blade width was 95 mm and blade angle was 35°. The mixing characteristics of new type of impellers were better than the traditional impellers.

Key words: glass-lined, impeller, mixing characteristics, numerical simulation