表面凸起对机翼热气防冰腔内换热强化的影响

doi:10.7527/S1000-6893.2016.0300

Abstract

Abstract:

A comparative study is conducted to investigate the heat transfer characteristic of turbulent flow in the hot air anti-icing system with and without surface convex by using numerical simulation method. Three-row impingement jet holes are set on the piccolo tube, with different impinging angles:0°±45° and 0°±30°. In order to strengthen the impinging heat transfer, the surface protrusions located in front of the impinging holes are designed as a guiding passage of the hot air. The influence of jet angle on heat transfer characteristics is studied by changing the angle of the jet. Calculation results show that the surface structures can enable the wall jet flow dispersing uniformly to be concentrated into wall jet flow with higher speed. Compared to the jet impingement heat transfer of anti-icing cavity with smooth surface, the convective heat transfer of the wall jet zone is enhanced. The heat transfer of jet impingement, especially on the wing leading edge, is thus increased.

Key words: hot air anti-icing, impinging jet, structure convex, enhanced heat transfer, numerical simulation

CLC Number:

V211.3

GUO Zhiqiang, ZHENG Mei, DONG Wei, ZHU Jianjun. Influence of surface convex on heat transfer enhancement of wing hot air anti-icing system[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(2): 520709-520718.

References

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Influence of surface convex on heat transfer enhancement of wing hot air anti-icing system

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