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本支概述了乳状液流变性研究成果的概况,以及利用四种不同粘度原油乳状液实验所得的数据研究了影响原油乳状液流变性的因素。从实验结果可以看出:乳状液的剪切应力和剪切速率的运动特性成原油微粒有密切的关系;对给定的原油浓度,非牛顿流体特性和表现粘度随粒度的减小而增加;大等数乳伏液在低剪切速率下表现为剪切变稀性(低于50s-1)。而在高于1000s-1剪切速率下表现为牛顿流体性质。同时还可以看出,鲍威尔定律模型不是对所有剪切速率范围都适用,应考虑采用三种变量模式。研究结果表明,原油液滴粒度的大小在乳状液的运动性质研究中是一个决定因素。乳状液配制时的搅拌强度、持续时间以及乳化剂波度与形顾的乳状液粒度大小成反比。
This section outlines the findings of the study on the rheology of emulsions and the factors that affect the rheology of the crude oil emulsion using data from experiments on four different viscosity crude oil emulsions. It can be seen from the experimental results that the kinetic characteristics of the shear stress and the shear rate of the emulsion are closely related to the crude oil particles. For a given crude oil concentration, the non-Newtonian fluid properties and the apparent viscosity increase with decreasing particle size. Larger isovolumic solutions exhibit shear thinning (less than 50s-1) at low shear rates. While behaving Newtonian at shear rates above 1000 s-1. It can also be seen that the Powell’s law model does not apply to all shear rate ranges and three variations should be considered. The results show that the particle size of crude oil droplets is a decisive factor in the study of the kinematic properties of emulsions. The mixing strength, duration and emulsifier waviness during emulsion formulation are inversely proportional to the particle size of the emulsion under consideration.