PFA疏水曲面沸腾汽膜输运过程及传热研究

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中图分类号：TQ026.4 文献标志码：A DOI： 10.3969/j.issn.1003-9015.2025.00.033

文章编号：1003-9015（2026）01-0033-11

Abstract：Petroleum products are essential energy sources with increasing demand worldwide.At the same time， the storage of liquefied natural gas （LNG） in chemical plants is geting more and more attention，among which the boiling liquid expanding vapor explosion （BLEVE） accidents are the most common accidents in chemical plants， so how to reduce the boiling heat transfer coefficient （HTC） is very important. Compared to hydrophilic surfaces， hydrophobic surfaces have hydrophobic properties，which allow bubbles to link into a film at low heat flux and reduce the HTC.Based on the principle of surface wetability，different sizes of spherical tanks in the chemical plantare scaled down in equal proportions.The boiling process of PFA hydrophobic surfaces with different curvatures was investigatedand compared with smooth copper surfaces by combining heat transfer data and visualizationpictures.Theresults show thatthecritical heat flux density（CHF）and HTCofthesurfaces coated with PFA hydrophobic coatings are significantly reduced， in which the highest HTC at the center angle of 0∘ of the four PFA hydrophobic surfaces with curvatures of 35-1 47-1 ！ 80-1 ，and 120-1mm-1 are reduced by 59.5% ， 80.7% ， （204号 61.4% and 60.0% ，respectively， in comparison with the curved smooth surfaces.

Key words： boiling liquid expansion vapor explosion；heat transfer coefficient；critical heat flux density; curved surface boiling

1前言

沸腾液体膨胀蒸汽爆炸（BLEVE）最早是在1957年由 Smith、Marsh和Walls在美国工厂研究时引人的概念。（剩余11275字）