کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7054296 1458017 2018 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transient thermal analysis of flash-boiling cooling in the presence of high-heat-flux loads
ترجمه فارسی عنوان
تجزیه و تحلیل حرارتی گذرا از خنک کننده جوش فلزی در حضور بارهای با گرمای زیاد
کلمات کلیدی
جوش فلزی، انتقال حرارت گذرا، خنک کننده تغییر فاز، فوم گرافیتی، طراحی آزمایش،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
A flash-boiling fluid rapidly cools and expands, responding to depressurization in as little as 10-100 ms. The presented dynamic cooling mechanism harnesses this phenomenon. Applications include pulsed, high-heat-flux (∼100 W cm−2) devices, particularly those requiring strict temperature stability (±5 °C) for a short duration (∼0.1 to 10 s). A highly conductive graphitic foam is included as an extended surface, while enhancing phase-change phenomena. In addition to quantifying the rate of heat transfer as it varies spatially and temporally, the temperature stability of the surrogate heat source is evaluated. The experiments were designed using a statistical framework, allowing for the efficient generation of surrogate models. These surrogate models are used to explore the multi-parameter design space, identifying design criteria that optimize different performance objectives, such as temperature stability, efficiency, and cooling rate. An inverse-heat-transfer technique is applied to determine the dynamic rate of cooling during the event. Cooling rapidly peaks after 0.5-1 s, reaching approximately 30-50 W cm−2, and steadily decays thereafter. The cooling device maintains stable system temperatures (±5 °C) during heat loads of up to 104 W cm−2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 123, August 2018, Pages 678-692
نویسندگان
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