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| 纳米颗粒吸附法减阻技术效果的快速评价方法 |
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狄勤丰1,2,丁伟朋口1,2,王新亮1,2,张任良1,2,顾春元1,2,龚玮1,2
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(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)
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| 摘要: |
| 针对R前纳米颗粒吸附法减阻技术效果评价周期长、成本高的不足，通过分析目前室内评价方法及总结纳米 颗粒吸附法减阻技术机制研究的成果，提出以岩心吸附片电镜扫描和接触角测试为手段的纳米颗粒吸附法减阻技 术效果快速评价方法。基丁纳米边界层水流滑移减阻机制，应用?心等径毛赞组模咽和Tdstoi提出的滑移长度与 接触角的关系，从理论上简要阐述该方法的内在机制《结果表明:新方法能有效缩短评价周期，降低试验成本;快速 评价方法的内在机制为纳米颗粒在岩心微通道壁面吸附使表面的接触角超过120°,产生较显著的滑移效应,从而达 到减阻效果。 |
| 关键词: 纳米颗粒 吸附 减附 电镜扫描测试 接触角 快速评价 |
| DOI：10.3969/j.issn.1673-5005.2012.03.018 |
| 分类号:TE 357.46 |
| 基金项目:国家自然科学基金项目(50874O7l);闰家“863”计划项S<2008AA06Z201);上海市科委重点科技攻关计划项目(071605102); |
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| adsorption technology |
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DI Qin-feng1,2,DING Wei-peng1,2,WANG Xin-liang1,2,ZHANG Ren-liang1,2,OU Chun-yuan1,2,GONG Wei1,2
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(1.Shanghai Institute of Applied Mathemat ics and Mechanics, Shanghai University, Shanghai 200072，China;2. Shanghai Key Laboratory of Mechanics in Energy and Environment Engineering, Shanghai 200072, China)
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| Abstract: |
| A new rapid evaluation method of drag reduction effect for nanoparlicles adsorption technology was presented in order to simplify the existing evaluation procedure and reduce the evaluation cost. The SEM and contaot angle test of the core slice adsorbed by nanoparticles were used to make the pre-evaluation in the new rapid evaluation method, which was based on the analysis of the existing evaluation methods and a lot of experimental drag reduction results of nanopaiticles adsorption technology. Based on the theory of drag reduction caused by wall slip, the internal mechanism of the rapid evaluation method was studied by using the simplified model of core composed of capillaries with the same diameter and the relation between slip length and contact angle proposed by Tolstoi. The results show that the new method could make an evaluation effectively and quickly, the evaluation cycle could be shortened and the evaluation cost could be reduced in large amounts. The internal mechanism of the rapid evaluation method is that the contact angle is over 120° through the nanoparticles adsorption on the wall of core micro-channel t which produces phorogenesis and drag reduction effect. |
| Key words: nanoparlicles adsorption drag reduction SKM test contact angle rapid evaluation |
