摘要
以光透过率作为纳米流体稳定性指标,同时采用L^(9)(3^(4))正交试验设计,分析超声振荡时间、分散剂种类和浓度等3个因素对羟基碳纳米管/乙二醇稳定性的影响,并对其黏度以及导热系数进行了测量。结果表明:3个因素对纳米流体稳定性的影响程度分别为:分散剂>超声振动时间>浓度。在纳米流体的质量浓度为0.07%、加入分散剂聚乙烯吡咯烷酮(PVP)和振荡时间为90min的条件下,得到的纳米流体稳定性最好。与基液相比,纳米流体的导热系数可提高1.34%,在-5~20℃时黏度随着温度的升高而显著降低。
Light transmittance was taken as the stability index of nanofluid,and L_(9)(3^(4))orthogonal experimental design was used to analyze the effects of three factors,such as ultrasonic oscillation time,dispersant type and concentration,on the stability of hydroxyl carbon nanotubes/glycol,and the viscosity and thermal conductivity were measured.The experiemntal results show that the influence degrees of the three factors on the stability of the nanofluid are dispersant>ultrasonic vibration time>concentration.When the dispersant polyvinylpyrrolidone(PVP)was added and the oscillation time was 90 min,the mass concentration of the nanofluid is 0.07%,and the stability of the nanofluid is best.Compared with the base liquid phase,the thermal conductivity of the nanofluid is increased by 1.34%,and the viscosity decreases significantly with the increase of temperature at-5~20℃.
作者
余霞
侯志坚
叶晓江
胡兴
李丹
史秋怡
YU Xia;HOU Zhi-jian;YE Xiao-jiang;HU Xin;LI Dan;SHI Qiu-yi(School of Optoelectronic Information and Energy Engineering,Wuhan Institute of Technology»Wuhan 433074,China;Institute of Electrical and Mechanical,Shenzhen Polytechnic,Shenzhen 518000,China;College of International,China University of Mining and Technology,Xuzhou 221116,China)
出处
《武汉理工大学学报》
CAS
北大核心
2019年第10期7-11,共5页
Journal of Wuhan University of Technology
基金
湖北省教育厅重点项目(D20111505)。
关键词
正交试验
羟基化
黏度
导热率
orthogonal test
hydroxylation
viscosity
thermal conductivity
