کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7046343 1457099 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study on composite insulation system of spray on foam insulation and variable density multilayer insulation
ترجمه فارسی عنوان
بررسی تجربی بر روی سیستم عایق کامپوزیت اسپری بر عایق فوم و عایق چند لایه چگالی متغیر
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The composite insulation system of spray on foam insulation (SOFI) and multilayer insulation (MLI)/variable density multilayer insulation (VDMLI) is regarded as the most promising insulation system for cryogenic propellant in space application. In this paper, the composite insulation system composed of SOFI and MLI/VDMLI is studied in theoretical analysis and experimental testing. A test bed has been built to test the insulation performance of the insulation system. Heat leakage and temperature distribution of the insulation system were measured and analyzed. Theoretical calculation was carried out by “Layer by layer method” and “Lockheed method”. Composite insulation system was tested with simulated fluid of liquid nitrogen in high vacuum condition and atmospheric pressure condition, respectively. The test results show that the thermal resistance of SOFI accounts for only 0.12% of the total thermal resistance in high vacuum condition experiment, while 45.37% in atmospheric pressure condition experiment. With 50 layers of reflector, the measured heat leakage of VDMLI is lower than that of MLI by 13.57%, and heat flux decreases by 17.49%. By comparing the experimental results and the calculated value, it can be found that Lockheed method and Layer by layer method are suitable for calculating heat flux through MLI, but need to be improved in solving the temperature distribution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 130, 5 February 2018, Pages 161-168
نویسندگان
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