کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5478125 1399256 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancement of Downward-Facing Saturated Boiling Heat Transfer by the Cold Spray Technique
ترجمه فارسی عنوان
افزایش حرارت انتقال جوش اشباع شده رو به پایین توسط تکنیک اسپری سرد
کلمات کلیدی
اسپری سرد محدودیت جریان شار حرارت، جوشاندن به سمت پایین، نگهداری در داخل رگ، پوشش کوچک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
چکیده انگلیسی
In-vessel retention by passive external reactor vessel cooling under severe accident conditions is a viable approach for retention of radioactive core melt within the reactor vessel. In this study, a new and versatile coating technique known as “cold spray” that can readily be applied to operating and advanced reactors was developed to form a microporous coating on the outer surface of a simulated reactor lower head. Quenching experiments were performed under simulated in-vessel retention by passive external reactor vessel cooling conditions using test vessels with and without cold spray coatings. Quantitative measurements show that for all angular locations on the vessel outer surface, the local critical heat flux (CHF) values for the coated vessel were consistently higher than the corresponding CHF values for the bare vessel. However, it was also observed for both coated and uncoated surfaces that the local rate of boiling and local CHF limit vary appreciably along the outer surface of the test vessel. Nonetheless, results of this intriguing study clearly show that the use of cold spray coatings could enhance the local CHF limit for downward-facing boiling by > 88%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Technology - Volume 49, Issue 1, February 2017, Pages 113-122
نویسندگان
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