CAJ | 학술논문

对纳米颗粒/矿物冷冻油的流变特性进行了全面的实验研究,重点分析了颗粒浓度、颗粒种类和温度对冷冻油流变特性的影响.结果表明:对于纳米颗粒TiO_2/矿物冷冻油,当ω(TiO_2)≤0.2%时,为牛顿流体,当ω(TiO_2)>0.2%时,表现为剪切变稀特性.纳米颗粒TiO_2/矿物冷冻油的黏度大于纯质冷冻油,且随着颗粒质量分数的提高而增大,当ω(TiO_2)=0.4%时,黏度可提高11.2%,拟合得到的混合物黏度模型预测值与实验值吻合良好.纳米颗粒种类对混合物的流变特性有一定的影响,这与颗粒的形状有关.纳米颗粒/矿物冷冻油的黏温曲线趋势与纯油相似.
대납미과립/광물냉동유적류변특성진행료전면적실험연구,중점분석료과립농도、과립충류화온도대냉동유류변특성적영향.결과표명:대우납미과립TiO_2/광물냉동유,당ω(TiO_2)≤0.2%시,위우돈류체,당ω(TiO_2)>0.2%시,표현위전절변희특성.납미과립TiO_2/광물냉동유적점도대우순질냉동유,차수착과립질량분수적제고이증대,당ω(TiO_2)=0.4%시,점도가제고11.2%,의합득도적혼합물점도모형예측치여실험치문합량호.납미과립충류대혼합물적류변특성유일정적영향,저여과립적형상유관.납미과립/광물냉동유적점온곡선추세여순유상사.
The rheological properties of the mixture of nanoparticles and mineral oil were investigated experimentally.The results indicate that the mixtures of TiO_2 nanoparticles and mineral oil are the Newtonian fluid when the nanoparticles mass fraction is less than or equal to 0.2%,andthe mixture viscosity decreases with the increase in the shear rate when the fraction is larger than 0.2%.The viscosity of the mixture of TiO_2 nanoparticles and mineral oil is greater than that of the mineral oil,and it increases with the increase in the nanoparticles fractions.When the nanoparticles fraction is 0.4%,the viscosity can increase by 11.2%.The experimental data are consistent with the data calculated from the model prediction.Different kinds of the nanoparticles have some effect on the rheologicai properties of the mixtures because of the particle shape.In addition,the viscosity-temperature curve of the mixture is similar to that of pure mineral oil.