当前位置: X-MOL 学术Int. J. Therm. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Experimental and numerical study of inclined free surface liquid jet impingement
International Journal of Thermal Sciences ( IF 4.5 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.ijthermalsci.2020.106389
Kuldeep Baghel , Arunkumar Sridharan , Janani Srree Murallidharan

Abstract Experimental and computational investigation is carried out to study heat transfer characteristics and to explain the underlying physics for the case of inclined free surface liquid jet impinging on a uniformly heated flat plate. Experimentally, four Reynolds number 17541, 26,311, 35,081, and 438,521 were considered while in the numerical study, Reynolds number of 17,541 and 26,311 were considered. In all the experiments, jet to surface spacing was fixed ( H / d = 4 ) and inclination angles of 45 o , 30 o , 30 o and 0 o (orthogonal jet) were considered. Local Nusselt number contours are presented for the above range of Reynolds number and inclination angle. Also, profiles of Nusselt number are analyzed and compared for different Reynolds numbers and inclination angles (θ). The numerical study was performed using SST-SAS model and VOF method was used to capture the liquid-air interface. The aim of the numerical study is to explain the underlying physics of heat transfer characteristics through flow dynamics. Streamlines, pressure, velocity, and turbulence intensity are calculated and plotted for a few cases. It is observed that with increasing inclination angle, the location of peak Nusselt number is shifted towards the compression side or uphill side, while the magnitude remains nearly the same. The point of maximum Nusselt number was found to be independent of Reynolds number.

中文翻译:

倾斜自由表面液体射流冲击实验与数值研究

摘要 进行了实验和计算研究以研究传热特性并解释倾斜自由表面液体射流撞击均匀加热平板的情况的基础物理。实验上,考虑了四个雷诺数 17541、26,311、35,081 和 438,521,而在数值研究中,考虑了雷诺数 17,541 和 26,311。在所有实验中,射流与表面的间距是固定的(H / d = 4),并考虑了 45 o 、30 o 、30 o 和 0 o 的倾角(正交射流)。为上述雷诺数和倾角范围提供了局部努塞尔数等值线。此外,对不同雷诺数和倾角 (θ) 的努塞尔数分布进行了分析和比较。数值研究使用 SST-SAS 模型进行,VOF 方法用于捕获液-气界面。数值研究的目的是通过流动动力学解释传热特性的基础物理学。计算并绘制了几种情况的流线、压力、速度和湍流强度。观察到随着倾斜角的增加,峰值努塞尔数的位置向压缩侧或上坡侧移动,而幅度几乎保持不变。发现最大努塞尔数点与雷诺数无关。计算并绘制了几种情况下的湍流强度和湍流强度。观察到随着倾斜角的增加,峰值努塞尔数的位置向压缩侧或上坡侧移动,而幅度几乎保持不变。发现最大努塞尔数点与雷诺数无关。计算并绘制了几种情况下的湍流强度和湍流强度。观察到随着倾斜角的增加,峰值努塞尔数的位置向压缩侧或上坡侧移动,而幅度几乎保持不变。发现最大努塞尔数点与雷诺数无关。
更新日期:2020-08-01
down
wechat
bug