Study on Nucleation Site Density of Surfaces Modified by Femtosecond Laser

Tang Wuyu; Zhou Lei; Zhang Junyi; Yan Xiao

doi:10.13832/j.jnpe.2022.05.0095

Volume 43 Issue 5

Oct. 2022

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Tang Wuyu, Zhou Lei, Zhang Junyi, Yan Xiao. Study on Nucleation Site Density of Surfaces Modified by Femtosecond Laser[J]. Nuclear Power Engineering, 2022, 43(5): 95-99. doi: 10.13832/j.jnpe.2022.05.0095

Citation:

Tang Wuyu, Zhou Lei, Zhang Junyi, Yan Xiao. Study on Nucleation Site Density of Surfaces Modified by Femtosecond Laser[J]. Nuclear Power Engineering, 2022, 43(5): 95-99. doi: 10.13832/j.jnpe.2022.05.0095

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Study on Nucleation Site Density of Surfaces Modified by Femtosecond Laser

doi: 10.13832/j.jnpe.2022.05.0095

CNNC Key Laboratory on Nuclear Reactor Thermo-hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2021-09-14
Rev Recd Date: 2022-06-07
Publish Date: 2022-10-12

Abstract

Abstract

Using stainless steel as the experimental piece, femtosecond laser technology is used to fabricate ordered micro-nano structures to prepare modified surfaces. The pool boiling nucleation site density experiment is carried out with deionized water as the working medium, and the nucleation site density experimental data of three different experimental surfaces (conventional surface, modified surface 1, and modified surface 2) under different thermal parameters are obtained. The variation law of nucleation site density with wall superheat degree is quantitatively analyzed, and an improved nucleation site density model is obtained by fitting on the basis of the Liquan model. It is found that the nucleation site density of the three experimental surfaces increases with the increase of wall superheat degree, and the nucleation site density of the modified surface is significantly higher than that of the conventional surface under the same thermal parameters.The improved model optimizes the predicted value of nucleation site density, and the predicted value is in good agreement with the experimental data.
- Nucleation site density,
- Pool boiling,
- Femtosecond laser,
- Modified surface,
- Improved model

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References(9)

References

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