کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7156381 1462647 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study of thermal contact resistance of rough surfaces based on the practical topography
ترجمه فارسی عنوان
بررسی مقاومت تماس حرارتی سطوح خشن بر اساس توپوگرافی عملی
کلمات کلیدی
مقاومت در برابر حرارت، سطوح خشن، شبیه سازی عددی، توپوگرافی عملی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
چکیده انگلیسی
An approach is proposed to predict the thermal contact resistance (TCR) of rough surfaces. The practical rough topography of surfaces is measured by a contour profiler and is reconstructed to numerically analyze the mechanical and thermal contact performance. The studied material pairs are Ti-6Al-4V-Ti-6Al-4V and C/C-SiC-high temperature ceramic (HTC). The TCR with air gap and vacuum gap conditions are calculated. The approach is validated by the comparison with experimental results of surfaces with the same topography at the same temperatures and loading pressures. The influence of thermal contact conductance between real contact asperities on the TCR of rough surfaces is studied. The approach can be used to predict TCR of different materials with different gap medium under different temperatures and loading pressures. The results show that the real contact area increases approximate linearly, while TCR decreases with the increasing pressure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Fluids - Volume 164, 15 March 2018, Pages 2-11
نویسندگان
, , , , ,