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Experimental study on bubble size distribution of subcooled flow boiling in cylinder head of internal combustion engines

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Abstract

Subcooled flow boiling is becoming an efficient and widely used heat transfer approach in internal combustion engine cooling systems. Bubble evolution behaviors are crucial for understanding the mechanism of subcooled flow boiling. In this study, a diesel engine test platform equipped with endoscopic high-speed photography system was built to investigate the characteristics of boiling bubble. Under various inlet liquid subcoolings and flow rates, the mean bubble diameters and bubble size distributions were measured and analyzed based on the image processing techniques. Most of the bubbles approximated the spherical and ellipsoidal shapes. The bubble size was distributed between 1 and 2.5 mm, and the bubble diameters increased with the decrease of the inlet subcooling and flow rate. The flow rate had a more significant effect on the formation of large boiling bubbles.

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Authors and Affiliations

  1. School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, 212013, China

    Jie Ni, Taotao Cao, Liuwendi Hou & Fei Dong

Authors
  1. Jie Ni
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  2. Taotao Cao
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  3. Liuwendi Hou
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  4. Fei Dong
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Corresponding author

Correspondence to Fei Dong.

Additional information

Recommended by Associate Editor Chang Yong Park

Jie Ni was born in 1982. She received her Ph.D. in 2016. She is a lecturer in Jiangsu University, China. She is engaged in subcooled flow boiling in internal combustion engine, thermal management of vehicles, and other novel enhanced heat transfer research.

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Ni, J., Cao, T., Hou, L. et al. Experimental study on bubble size distribution of subcooled flow boiling in cylinder head of internal combustion engines. J Mech Sci Technol 33, 913–921 (2019). https://doi.org/10.1007/s12206-019-0148-x

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  • DOI: https://doi.org/10.1007/s12206-019-0148-x

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