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Publisher: Elsevier
Languages: English
Types: Article
Subjects:

Classified by OpenAIRE into

arxiv: Physics::Fluid Dynamics
Experimental study of the local and average heat transfer characteristics of a single round jet impinging on the concave surfaces was conducted in this work to gain in-depth knowledge of the curvature effects. The experiments were conducted by employing a piccolo tube with one single jet hole over a wide range of parameters: jet Reynolds number from 27,000 to 130,000, relative nozzle to surface distance from 3.3 to 30, and relative surface curvature from 0.005 to 0.030. Experimental results indicate that the surface curvature has opposite effects on heat transfer characteristics. On one hand, an increase of relative nozzle to surface distance (increasing jet diameter in fact) enhances the average heat transfer around the surface for the same curved surface. On the other hand, the average Nusselt number decreases as relative nozzle to surface distance increases for a fixed jet diameter. Finally, experimental data-based correlations of the average Nusselt number over the curved surface were obtained with consideration of surface curvature effect. This work contributes to a better understanding of the curvature effects on heat transfer of a round jet impingement on concave surfaces, which is of high importance to the design of the aircraft anti-icing system.
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    • Zhou Ying is a Ph.D. student at School of Aeronautic Science and Engineering, Beihang University. He received his B.S. degree in aircraft environment and life support engineering there in 2012. His main research interests are hot air anti-icing system and heat transfer of piccolo jets.
    • Bu Xueqin is an associate professor at School of Aeronautic Science and Engineering, Beihang University. She received her Ph.D. degree from the same university in 2009. Her area of research includes aircraft ice accretion, anti-icing and de-icing technology and high efficiency heat transfer.
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