کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7054527 | 1458019 | 2018 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microspray quenching on nanotextured surfaces via a piezoelectric atomizer with multiple arrays of micronozzles
ترجمه فارسی عنوان
خنک کردن میکروسپارا روی سطوح نانوکامپوزیتی با استفاده از یک دستگاه اسپری پیزوالکتریک با آرایه های چند میکرونیزل
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
We present an experimental study on heat transfer characteristics with the goal to enhance the cooling performance of a water spray impinged on smooth, polished copper surfaces and three different types of nanotextured surfaces with different thicknesses of diamond-like carbon (700 and 1000â¯nm), multi-wall carbon nanotube (50, 100 and 150â¯nm), and graphene nanotextured surfaces (1, 2, 5, and 10â¯nm). A multiple spray was produced by a commercial piezoelectric (PZT) actuator (powerâ¯=â¯1.5â¯W and frequency 104â¯kHz) with a nozzle hole size of djâ¯=â¯35â¯Âµm and a corresponding mass flow rate of 5.33â¯Ãâ¯10â4â¯kg/s at a spray height of 50â¯mm. Relevant data for both the transient and steady state boiling heat transfers (BHT), as well as the quench tests were obtained and discussed. Furthermore, the effect of the nanotextured surface thickness on cooling performance was extensively examined. Results indicated that the nanotextured surfaces enhanced the spray cooling performance mainly due to the improved wettability and liquid spreading that they provided especially for graphene thin films. A somewhat high critical heat flux (CHF) of nearly 310â¯W/cm2 (the corresponding heat transfer coefficient, HTCâ¯ââ¯3â¯W/cm2â¯K) under a specific working condition for graphene thin-film surfaces with 1â¯nm thickness was found. Furthermore, the thermal conductivity effect was also noted and significant influence on BHT and CHF was found for graphene nanotextured surfaces.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 121, June 2018, Pages 832-844
Journal: International Journal of Heat and Mass Transfer - Volume 121, June 2018, Pages 832-844
نویسندگان
Shou-Shing Hsieh, Wei-Che Chang,