کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4993991 | 1458025 | 2017 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental study on the relation between internal flow and flashing spray characteristics of R134a using straight tube nozzles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Internal flow, specifically nucleation, inside the nozzle has a significant effect on external spray characteristics. The relation between the internal flow pattern and spray characteristics of R134a flashing spray was investigated by using the transparent nozzle with length of 60Â mm and inner diameter of 1.4Â mm. In addition, the effect of inlet pressure on the spray characteristics, such as spray cone angle, droplet velocity, and temperature, were measured by using stainless-steel tube nozzles with length of 60Â mm and diameter of 1.4, 1.2, and 1.0Â mm. The high flow velocity, droplet velocity, low mass flow rate and decrease of superheat caused by the evaporation inside the nozzle lead to the decrease of spray cone angle, while the evaporation inside the nozzle contributes to the formation of fine droplets. Promoting the formation of stable bubbly flow inside the nozzle could be an effective way to acquire a small cone angle and fast drop of droplet temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 115, Part B, December 2017, Pages 524-536
Journal: International Journal of Heat and Mass Transfer - Volume 115, Part B, December 2017, Pages 524-536
نویسندگان
Xin-Sheng Wang, Bin Chen, Rui Wang, Hui Xin, Zhi-Fu Zhou,