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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

EFFECT OF SURFACE MORPHOLOGY ON SUBCOOLED FLOW BOILING UNDER THE TYPICAL CONDITION OF INTERNAL COMBUSTION ENGINES

Get access (open in a dialog) DOI: 10.1615/IHTC16.bae.022433
pages 721-729

Résumé

The surface morphology of the cooling channel plays an important role in boiling heat transfer, but it is often neglected in modern internal combustion (IC) engine cooling systems. In this paper, the subcooled flow simulations on structured surface with different cavity configurations were carried out under the typical engine condition. The calculated heat flux of subcooled flow boiling on the structured surface was found to be larger than that on the plain surface under different conditions validated by experimental results of Liu. The vapor volume fraction and velocity distributions above plain and structured heating surface were compared to explicate the enhancement mechanism of boiling heat transfer. The response surface approximation model with the average error of 4.5% and R2 of 96.3 was established based on the Computational Fluid Dynamic (CFD) results. The effects of geometric parameters such as cavity spacing, cavity diameter and cavity depth on heat flux were quantitatively examined with above approximation model.