Spray Impingement Heat Transfer Using Nanofluid—Experimental Study

2019 ◽  
pp. 369-377
Author(s):  
Bikash Pattanayak ◽  
Abhishek Mund ◽  
J. S. Jayakumar ◽  
Kajal Parashar ◽  
S. K. S. Parashar
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Impingement Heat Transfer ◽  
Spray Impingement

scholarly journals Experimental study of curvature effects on jet impingement heat transfer on concave surfaces

2017 ◽  
Vol 30 (2) ◽  
pp. 586-594 ◽  
Author(s):  
Ying Zhou ◽  
Guiping Lin ◽  
Xueqin Bu ◽  
Lizhan Bai ◽  
Dongsheng Wen
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Jet Impingement ◽  
Curvature Effects ◽  
Impingement Heat Transfer

An Experimental Study of Impingement Heat Transfer on the Surfaces With Micro W-Shaped Ribs

2015 ◽  
Author(s):  
Yu Rao ◽  
Peng Chen ◽  
Jiaqi Zhu
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Flat Plate ◽  
Pressure Loss ◽  
Cooling System ◽  
Cross Flow ◽  
Jet Impingement ◽  
Test Plate ◽  
Plate Spacing ◽  
Impingement Heat Transfer

The paper proposed an idea of using micro-W-shaped ribs on a test plate to improve the impingement heat transfer performance in a multiple-jet impingement cooling system. An experimental study has been conducted on the heat transfer characteristics of multiple-jet impingement onto a flat plate and a roughened plate with micro W-shaped ribs under maximum cross flow scheme. Transient liquid crystal thermography method has been used to obtain the detailed impingement heat transfer distribution for the Reynolds numbers from 15,000 to 30,000.The effects of micro W ribs on the local Nusselt number and the related pressure loss were investigated experimentally. The jet-to-plate spacing H/d=1.5 was used in the experiments for both the flat and the micro-W-rib roughened plate. The experiments showed that the micro W ribs on the plate can enhance the impingement heat transfer globally and locally, and increase the heat transfer uniformity, which are due to the facts that the micro W ribs on the test plate increase the near-wall turbulent mixing by interacting with the wall jets and cross flow. The pressure loss is negligibly increased compared to the impingement onto the flat plate.

An Experimental Investigation of Impingement Heat Transfer in Narrow Space With Full-Height Pin Fins

2016 ◽  
Author(s):  
Yu Rao ◽  
Chaoyi Wan ◽  
Yuyang Liu ◽  
Jiang Qin
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Reynolds Numbers ◽  
Target Plate ◽  
Pin Fin ◽  
Impingement Heat Transfer ◽  
Pin Fins ◽  
Narrow Space ◽  
Pin Fin Arrays ◽  
Full Height

An experimental study has been conducted on multiple-jet impingement heat transfer in a narrow space with full-height pin fins under maximum cross flow scheme. Transient liquid crystal thermography method has been used to obtain the detailed impingement heat transfer distribution for the Reynolds numbers from 15,000 to 30,000. The experimental study shows that the spanwisely-averaged Nusselt number ratio Nu/(Re0.8 Pr1/3) is almost independent of Reynolds numbers, and the full-height pin-fin arrays can slightly improve the average Nusselt number on the endwall of the target plate by about 5.0%, and increase the pressure loss by up to about 17.9%. It is also found that heat transfer uniformity is also improved on the endwall of the target plate with pin fin arrays.

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