颗粒沉积对纳米流体流动及换热影响实验研究

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基金项目:

国家自然科学基金资助项目(51276164)

先进反应堆工程与安全教育部重点实验室开放基金资助项目

Experimental Study on Effects of Nanoparticles Deposition on Flow and Heat Transfer Characteristics of Nanofluid

1. State Key Laboratory of Mechanical Structural Strength and Vibration, Xi'an Jiaotong University, Xi'an, 710049, China;
2. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, China

摘要: 分别在有纳米颗粒沉积和没有纳米沉积的情况下,对不同纳米颗粒浓度的Al₂O₃/H₂O纳米流体在竖直圆管内的流动和换热特性进行实验研究,分析了纳米颗粒在竖直圆管换热面上的沉积对管内纳米流体流动及换热特性的影响。结果表明:纳米颗粒的沉积对流动特性有显著影响,对换热特性的影响并不明显;随着纳米颗粒浓度的增大,摩擦阻力系数和换热能力都有显著增加。
- 纳米流体 /
- 颗粒沉积 /
- 流动及换热特性 /
- 实验研究
Abstract: The effects of nanoparticles deposition on the nanofluid flow and convective heat transfer characteristics in the vertical tube were studied experimentally.Flow and heat transfer characteristics of Al₂O₃/H₂O nanofluid in the vertical tube were studied under different nanoparticle concentration in the case of nanoparticles deposition and no nanoparticle deposition respectively.The results showed that nanoparticles deposition have significant effects on the flow characteristics but the effect on heat transfer characteristics is not obvious,and with the increasing of the nanoparticle concentration,the frictional coefficient and the heat transfer capacity have been significantly enhanced.
- Nanofluid /
- Nanoparticle deposition /
- Flow and heat transfer characteristics /
- Experimental study