کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5019951 1369640 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical investigation of unsteady mixing mechanism in plate film cooling
ترجمه فارسی عنوان
بررسی عددی مکانیزم اختلاط ناپایدار در خنک کننده فیلم های صفحه
کلمات کلیدی
مکانیسم مخلوط کردن، گرداب های ضد متقارن، تداخل متقابل، خنک کننده فیلم، شبیه سازی گردابی بزرگ،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


- Under the unsteady flow dynamics, the details of the flow and heat-transfer characteristics are obtained by large eddy simulation.
- Investigation of the law of mutual interference between gas films in parallel holes.

A large-scale large eddy simulation in high performance personal computer clusters is carried out to present unsteady mixing mechanism of film cooling and the development of films. Simulation cases include a single-hole plate with the inclined angle of 30° and blowing ratio of 0.5, and a single-row plate with hole-spacing of 1.5D and 2D (diameters of the hole). According to the massive simulation results, some new unsteady phenomena of gas films are found. The vortex system is changed in different position with the development of film cooling with the time marching the process of a single-row plate film cooling. Due to the mutual interference effects including mutual exclusion, a certain periodic sloshing and mutual fusion, and the structures of a variety of vortices change between parallel gas films. Macroscopic flow structures and heat transfer behaviors are obtained based on 20 million grids and Reynolds number of 28600.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theoretical and Applied Mechanics Letters - Volume 6, Issue 5, September 2016, Pages 213-221
نویسندگان
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