کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7051781 | 1457383 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microspray flow/thermal characteristics via a micro-piezoelectric atomizer with single and multiple arrays of micronozzles
ترجمه فارسی عنوان
ویژگی های جریان / حرارتی میکروسپارایتی توسط یک دستگاه اسپری میکرو پیزوالکتریک با آرایه های تک و چند میکرونیزل
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
An experimental study on the flow characteristics (only for a single microhole) and cooling performance (multiple array of microholes) of water spray impingement on a polished copper plate using a commercial piezoelectric (PZT) atomizer with multiple arrays of micronozzles (â¼900â¯holes) was conducted. Microholes of djâ¯=â¯35â¯Âµm were used and tested with a total volumetric flow rate of 0.361-22.5â¯cm3/min and a corresponding mass flow rate of 6â¯Ãâ¯10â6â¯kg/s-3.7â¯Ãâ¯10â4â¯kg/s using seven spray heights of 30â¯mm, 40â¯mm, 50â¯mm, 60â¯mm, 70â¯mm, 80â¯mm and 90â¯mm. µPIV and IPI optical velocimetry, as well as temperature distribution and a droplet size analyzer, were used to measure the downstream local velocity and temperature profile during the spray flight and its associated droplet size distribution for single and multiple arrays of micronozzles. Results of the flow characteristics show that a well-mixed atomization can be found at a spray height of 50â¯mm, and the spray pattern keeps its symmetry as the flow proceeds downstream. A very rapid cooling rate of â15â¯Â°C/s can be reached at the critical heat flux (CHF) for djâ¯=â¯35â¯Âµm with a spray height of Hâ¯=â¯50â¯mm. The effect of the spray height was examined, and it was found that the best cooling performance for a spray height of 50â¯mm with a CHF can be up to 259â¯W/cm2 (steady) and 209â¯W/cm2, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 93, May 2018, Pages 96-107
Journal: Experimental Thermal and Fluid Science - Volume 93, May 2018, Pages 96-107
نویسندگان
Shou-Shing Hsieh, Yi-Fan Yeh, Yi-Fang Li,