کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4991305 1457110 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Regulation-controlling of boundary layer by multi-wire-to-cylinder negative corona discharge
ترجمه فارسی عنوان
مقررات کنترل لایه مرزی توسط تخلیه کرونا منفی چند سیمه به سیلندر
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Multi-wire-to-cylinder corona discharge was studied for better understanding of the electrohydrodynamic phenomena which directly relate to the performance of heat transfer enhancement. A unipolar approximation model was established and numerical simulations were conducted to determinate the heat transfer and velocity distribution of ionic wind. The numerical and experiments results show good agreement. It indicates that higher applied voltage and more corona wires can help decreasing thermal boundary layer thickness and increasing velocity gradient of boundary layer, resulting in the enhancement of heat transfer. When the applied voltage increases from −7 kV to −11 kV and the number of wire increases from corona wire number 1-3, there will be a 39.8% decrease of the thickness of thermal boundary layer. In the condition of U = −11 kV, the maximum local forced convection heat transfer coefficient for corona wire number N = 3 is 12 times and the average value is 8 times higher than that of natural convection.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 119, 5 June 2017, Pages 438-448
نویسندگان
, , , , , , , ,