【摘要】 用回转兼上下动搅拌器混合高粘度牛顿流体和非牛顿流体时,在层流域测定了功率数K_P、混合时间T_M和Metzner常数K_S。结果表明:该搅拌器的功率消耗可关联成N_P·Re^**=K_p/K_s^1-n,使牛顿流体和非牛顿流体达到同样的混合效果;其能耗与通常的双螺带搅拌器相比,分别降低80％和65％以上,因而是一种值得推广的高效节能搅拌器。更多还原

【Abstract】 The power consumption Kp, mixing time Tm and Metzner constant K(?) of a rotating impeller with up-and-down motion were measured for mixing highly viscous Newtonian and non-Newtonian fluids under a laminar regime. The power consumption was expressed by the equation:Np·Re = Kp/K1-n.Up to 80% and 65% energy for mixing Newtonian and non-Newtonian fluids respectively may be saved with the complex agitator as compared with the helical ribbon agitator to the same degree of homogeneity. Therefore, it is a highly-effective and energysaving agitator and worth being applied.更多还原