摘要
为研究水基SiC纳米流体沉降稳定性的影响因素和属性特征,首先采用两步法制备该纳米流体样品,在重力场和离心作用下,研究分散剂种类、质量分数、基液种类、颗粒粒径、机械搅拌时间、温度和pH值对SiC纳米流体沉降稳定性的影响,然后通过紫外分光光度计筛选出分散稳定性最佳的纳米流体作为样本,测量不同温度下的黏度,常温下的密度、体积弹性模量、比热容和热导率。最后针对流体特性会随着外界环境的压力,温度,溶解或混入的空气量等参数的变化而变化,随之影响到液压系统的性能这个问题,参考相关函数关系,应用AMEsim软件对纳米流体的特性进行数值模拟仿真计算,并讨论其在不同温度和压力下的变化情况,为纳米流体作为功能流体的应用提供制备和仿真算法基础。
To study factors that affect sedimentation stability of water-based SiC nanofluids and attribute characteristics,firstly,the nanofluid sample was prepared by two-step method.Under the gravity field and centrifugation,the dispersant type,mass fraction,base type,particle size,mechanical stirring time,temperature and pH value were studied to study the stability impact of SiC nanofluid sedimentation.Then,the nanofluid with the best dispersion stability was taken out by ultraviolet spectrophotometer as a sample to measure the viscosity at different temperatures,density at room temperature,bulk modulus,specific heat capacity and thermal conductivity.Finally,when the temperature,pressure,dissolved or mixed air quantity of the nanofluid changes,the characteristics of the fluid will change accordingly,which will affect the performance of the application system.Refer to the correlation function relationship to apply the AMEsim software to the nanofluid.The characteristics are simulated and discussed for changes at different temperatures and pressures.Provides a basis for preparation and simulation calculations for applications where nanofluids are used as functional fluids.
作者
恭飞
吴张永
王雪婷
杜奕
GONG Fei;WU Zhangyong;WANG Xueting;DU Yi(Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China;City College, Kunming University of Science and Technology, Kunming 650500, China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第3期986-994,1001,共10页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(51165012)。
关键词
SiC纳米流体
分散
稳定性
数值模拟
功能流体
SiC nanofluid
dispersion
stability
numerical simulation
functional fluid
