کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4992904 1457466 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Operational characteristics of oscillating heat pipes under micro-gravity condition
ترجمه فارسی عنوان
خصوصیات عملیاتی لوله های نوسان گرما تحت شرایط گرانشی میکرو
کلمات کلیدی
نوسان لوله گرما، نوسان حرکت تماس زاویه هیسترزیس، شروع، میکرو گرانش
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
A mathematical model to investigate the oscillating motion characteristics of liquid slugs and vapor plugs/bubbles in oscillating heat pipes (OHPs) was developed considering the contact angle hysteresis (CAH) and interconnected-tube induced pressure fluctuations. Results show that a short period less than 1 s is available to attain the steady state after startup and then the oscillation amplitudes and frequencies for both of slug/bubble displacement and velocity are kept fixed. The slug/bubble displacement and velocity display quasi-sine oscillating waves with small pressure fluctuations induced by the interconnected-tube. However, small oscillation waves are superimposed on a main quasi-sine oscillation wave and cause a chaotic oscillating behavior of slug/bubble inside the OHP if the induced pressure fluctuation is large enough. Besides, the effects of filling ratio, tube length, inner diameter, temperature difference between the evaporator and condenser sections, and working fluid on the oscillating motion were numerically analyzed and discussed. The numerical model provides a physical insight to understand the operational mechanism of OHPs under the microgravity condition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Communications in Heat and Mass Transfer - Volume 88, November 2017, Pages 28-36
نویسندگان
, , , ,