کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7048836 | 1457138 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of successive alternating wall deformation on the performance of an annular heat exchanger
ترجمه فارسی عنوان
اثر تغییر شکل دیوار متناوب متوالی بر عملکرد یک مبدل حرارتی حلقوی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Successive alternating wall deformations are applied to the external and internal walls of a coaxial tube. Through a numerical study, the flow structuration created by the combination of the wall deformations is investigated. The effect of the longitudinal phase-shifting between the external and internal deformations is more specifically studied by considering velocity vectors and normalised helicity fields. All the simulations are performed under the assumption of a laminar, incompressible and stationary flow. The convective heat transfer is also calculated and the performance evaluation criterion PEC=(Nu/Nu0)/(f/f0)1/3 is used to assess the thermal-hydraulic performances. For a fixed temperature condition on both walls, it is shown that the heat transfer performances are increased compared with a smooth annular geometry. The phase-shifting value giving the best thermal-hydraulic performances is also identified: a phase-shifting of one eight of a wavelength between the external and internal walls helps increasing the performances of 43%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 90, 5 November 2015, Pages 286-295
Journal: Applied Thermal Engineering - Volume 90, 5 November 2015, Pages 286-295
نویسندگان
Julie-Anne Zambaux, Jean-Luc Harion, Serge Russeil, Pascale Bouvier,