期刊
POWDER TECHNOLOGY
卷 356, 期 -, 页码 335-341出版社
ELSEVIER
DOI: 10.1016/j.powtec.2019.08.031
关键词
Experimental investigation; Characterization of nanoparticles; Zinc oxide nano-powder; Stability; Nano-lubricant; Thermal conductivity
资金
- National Natural Science Foundation of China [51876040]
- Shenzhen Science and Technology Innovation Committee (STIC) [JCYJ20180306174450120]
- Zhishan Youth Scholar Program of SEU
The present study aims at enhancing the thermal performance of SAE 50 engine oil by adding zinc oxide nano-particles. The investigations are performed in the thermal range of 25 to 55 degrees C and at the volume fractions of 0.125 to 1.5%. In this regard, first, the characterization of nanoparticles was performed to examine their surface and atomic structure. Moreover, following the manufacture of the nano-lubricant, its stability was investigated by the DLS test. After ensuring the results of nano-lubricant stability, different samples were prepared according to the variations in volume fraction, followed by the experimental measurement of the thermal conductivity of nano-lubricant. The obtained results revealed an ascending trend in thermal conductivity by increasing temperature and concentration. The maximum thermal conductivity enhancement was 8.74%. Based on the experimental results, a sharply precise relation was proposed to predict the ratio of nano-lubricant thermal conductivity to that of the tested base fluid. (C) 2019 Elsevier B.V. All rights reserved.
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