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Journal of Applied Fluid Mechanics، جلد ۱۱، شماره ۱، صفحات ۲۲۵-۲۳۲
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عنوان انگلیسی Experimental Study of Subcooled Boiling Heat Transfer of Axial and Swirling Flows inside Mini Annular Gaps
چکیده انگلیسی مقاله An experimental study of the subcooled boiling heat transfer of axial and swirling upward flows inside vertical mini annular gaps was conducted using deionized water. The subcooled boiling heat transfer coefficients and the boiling curves of the flow inside mini annular gaps with different gap sizes have been investigated. The experimental results both for the single phase heat transfer and subcooled boiling heat transfer inside mini annular gaps showed very good agreement with correlations in the literature. The results showed that the subcooled boiling heat transfer coefficient for a given heat flux increases as the size of the annular gap is decreased. The maximum wall superheat is also influenced negligibly by mass flux. Furthermore, the effects of swirl flow by using spring insets inside the mini annuli on the single phase and subcooled boiling heat transfer have been studied. The results showed that the single phase and subcooled boiling heat transfer coefficients are increased by having swirl flow inside mini annuli using spring inserts. The obtained results also showed that the heat transfer enhancement by having swirl flow inside the annuli using spring inserts decreases as the applied heat flux is increased in the subcooled boiling heat transfer region.
کلیدواژه‌های انگلیسی مقاله Flow Boiling, Mini Annular Gap, Subcooled, Swirling flow, Heat transfer
نویسندگان مقاله S. Ahangar Zonouzi |
Department of Mechanical Engineering, Razi University, Kermanshah, Iran.

H. Safarzadeh |
Department of Mechanical Engineering, Razi University, Kermanshah, Iran.

H. Aminfar |
Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran

M. Mohammadpourfard |
Faculty of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, Iran.

نشانی اینترنتی https://www.jafmonline.net/article_580_b5151ef0bed8d03f49c414cdeae3ada3.pdf
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