کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
656546 1458050 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of swirling flow on mass and momentum transfer downstream of a pipe with elbow and orifice
ترجمه فارسی عنوان
تأثیر جریان متناوب بر انتقال جرم و حرکتی در پایین یک لوله با آرنج و سوراخ
کلمات کلیدی
ضریب انتقال توده، انرژی آشفته جریان چرخشی، آرنج، ابعاد نازک شدن لوله-دیوار،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The influence of swirling flow on mass and momentum transfer downstream of a pipe with elbow and orifice is studied experimentally. The experiments are carried out in the pipe at Reynolds number Re = 3 × 104 for various magnitudes of swirl intensity up to 0.9 driven by the rotary swirler. The mass transfer coefficient and the cross-sectional velocity field downstream of the orifice are measured by the plaster dissolution method and the stereo PIV, respectively. It is found that the mass transfer coefficient and the turbulent energy increases gradually with increasing the swirl intensity, while they become non-axisymmetric downstream of the orifice for the swirl intensity larger than 0.6 at the inlet of the elbow, which is followed by the saturation at higher swirl intensity. The maximum mass transfer coefficient is found to have a peak at one diameter downstream of the orifice and it reaches 6 times larger value than that of the straight pipe without swirling flow. The behavior of the maximum mass transfer coefficient with respect to the swirl intensity is similarly observed in the near-wall turbulent energy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 92, January 2016, Pages 394-402
نویسندگان
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