ZrO_2-水纳米流体管内层流流动特性的实验研究  

Experimental Study of ZrO_2-Water Nano Fluids Laminar Flow Characteristics Inside the Tube

作　　者：孙斌[1] 孙通[1] 辛凯[1] 张全厚[1] 

机构地区：[1]东北电力大学能源与动力工程学院,吉林吉林132012

出　　处：《工程热物理学报》2014年第2期287-290,共4页Journal of Engineering Thermophysics

摘　　要：实验研究了粒径为50 nm,质量分数为0.2%,0.4%,0.8%,1.2%的ZrO_2-水纳米流体分别在弯管和直管内的流动特性以及纳米流体的稳定性.实验结果表明:通过加入分散剂使纳米流体稳定性得到显著提高,在相同温度的层流状态下,弯管的流动阻力系数大于直管.纳米流体的黏度随着质量分数的增大而增大,在相同Re下,纳米流体在层流区内阻力系数随纳米流体质量分数的增加而增大.Experiments were carried out on the particle size of 50 nm, mass fraction of 0.2%, 0.4%, 0.8%, 1.2% of ZrO2-water nanofluids respectively in bending tube and straight pipe flow characteristics of inside, and the nanofluids stability. The experimental results show that： the stability of the nanofluids is significantly improved by adding dispersant. In the same temperature under laminar state, the resistance coefficient of bending tube is larger than the friction coefficient of straight pipe along the riser. The viscosity of the nanofluids increases with the mass concentrations of nano-particles. In the same Re, the resistance coefficient of the nanofluids increases with the mass concentrations of nano-particles in the laminar state.

关 键 词：纳米流体 弯管 直管 流动特性 

分 类 号：TK124[动力工程及工程热物理—工程热物理]