کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
666739 1458536 2012 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Void fraction prediction in annular two-phase flow
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Void fraction prediction in annular two-phase flow
چکیده انگلیسی

A new method to predict the void fraction in annular two-phase flow in macroscale and microscale channels is presented. The underlying experimental database contains 2673 data points collected from 29 different literature studies for 8 different gas–liquid and vapor–liquid combinations (water–steam, R410a, water–air, water–argon, water–nitrogen, water plus alcohol–air, alcohol–air and kerosene–air), for tube diameters from 1.05 mm to 45.5 mm and for both circular and non-circular channels. The new prediction method is strongly simplified with respect to most existing correlations, as it depends only on vapor quality and the gas to liquid density ratio and reproduces the available data better than existing prediction methods. Importantly, this study shows that there appears to be no macro-to-microscale transition in annular flows, at least down to diameters of about 1.0 mm.


► New method to predict the void fraction in annular two-phase flow.
► Method covers macroscale and microscale tubes, circular and non-circular channels.
► Method works for adiabatic and evaporating flows.
► Large underlying experimental database (2673 points).
► Method based on two flow parameters (vapor quality and density ratio) and three empirical constants.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Multiphase Flow - Volume 43, July 2012, Pages 72–84
نویسندگان
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