减阻型纳米二氧化硅流体的流变性分析  

Research of Rheology of Friction-Reducing Nano Silicon Dioxide Fluid

作　　者：庞东山 顾春元[1,2] 狄勤丰[1,2] 蒋帆[1,2] 李国健[1,2] 张景楠[1,2] 

机构地区：[1]上海大学上海市应用数学和力学研究所,上海200072 [2]上海大学上海市力学在能源工程中的应用重点实验室,上海200072

出　　处：《西安石油大学学报（自然科学版）》2016年第5期78-83,共6页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金(编号:51274136;50874071);上海市科委重点项目(编号:071605102);上海高校创新团队;上海市重点学科建设项目(编号:S30106);上海市力学在能源工程中的应用重点实验室项目

摘　　要：采用流变仪等方法测试了自主研发的减阻型纳米流体HNFⅢ的流变性,研究分析了纳米SiO_2颗粒浓度（质量分数0.002 5%~0.20%）、剪切速率和温度等参数对HNFⅢ流变性的影响规律,以及HNFⅢ的剪切增稠机理。结果表明：HNFⅢ的黏度随纳米SiO_2颗粒浓度的增加而升高;剪切速率低于临界剪切速率值γ0时,纳米流体的黏度几乎不变,而一旦超过γ0,黏度快速升高,具有明显的剪切增稠特性,并且低浓度的纳米流体黏度上升更快,导致了不同浓度的纳米流体黏度出现汇聚的特征;同时,临界剪切速率γ0随温度升高而减小,随浓度升高而增大。实验得到了纳米液HNFⅢ的本构方程,显示其属于膨胀性流体。重复测试和双向剪切测试表明,剪切增稠具有良好的可逆性,满足＂粒子簇＂理论。The rheology of a self-developed friction-reducing nano silicon dioxide fluid HNFⅢ was tested with rheometer,the effects of silicon dioxide particle concentration,shear rate and temperature on the rheology of the nano silicon dioxide fluid HNFⅢ were studied,and the shear thickening mechanism of HNFⅢ was analyzed. It is shown that： the viscosity of HNFⅢ increases with the increase of the silicon dioxide particle concentration; when shear rate is lower than the critical shear rateγ0,the viscosity of HNFⅢ is nearly constant,once it is more than γ0,the viscosity of HNFⅢ quickly increases; HNFⅢ has obvious shear thickening characteristic,and the viscosity of the HNFⅢ of low concentration increases more quickly than that of high concentration,which leads to the convergence of the nano fluid viscosity of different concentration; the critical shear rateγ0 decreases with the increase of temperature and increases with the increase of silicon dioxide particle concentration. The constitutive equation of HNF III is obtained by experiments,which shows that it belongs to expansive fluid. Repeated tests and bidirectional shear tests show that the shear thickening has good reversibility,which satisfies the ＂ particle cluster＂ theory.

关 键 词：减阻 纳米流体 流变学 剪切增稠 临界剪切速率 

分 类 号：TE357[石油与天然气工程—油气田开发工程] TB383[一般工业技术—材料科学与工程]