Publication: The study of dimensionless thermal Characteristics of hot air impingement on a nacelle lipskin
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Date
2024-07-12
Authors
Esther, Suling Gau
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Abstract
Ice formation on aircraft components, mainly nacelles, is a severe safety issue and hence requires efficient anti-icing systems. The objective of this thesis is to
investigate the dimensionless thermal characteristics of hot air impingement on a nacelle lipskin to provide a basis for its integration with bias acoustic liners for
performance enhancement. This study has attempted to control the inlet pressure of hot air into the nacelle lipskin and the velocity of free flow air stream over its external surface to understand the resulting thermal characteristics. Some of the key findings from the experiment show that the Nusselt number increases by an average of 3.14% with the Reynolds number for all inlet pressures, confirming the enhanced heat transfer due to increased turbulence and mixing at higher flow velocities. Additionally, the efficiency of convective heat transfer is highlighted as the dimensionless temperature decreases by an average of 3.14% as the Reynolds number increases. It has met the intended objectives of the research in terms of the development of an effective experimental setup, analyzing heat transfer characteristics of the nacelle lipskin under impinging hot air, and demonstrating the influence of Reynolds number and inlet pressure on these characteristics. These findings have added valuable knowledge in convective heat transfer and can be used as the basis for future research in the optimization of aerospace thermal management.