短舱防冰系统三维内外流耦合计算方法

doi:10.7527/S1000-6893.2022.27425

Abstract

Abstract:

To improve the efficiency of anti-icing performance evaluation and support the design of nacelle anti-icing system， a 3D computational method for conjugate heat transfer between internal and external flow of the nacelle inlet piccolo hot air anti-icing system is proposed based on the loose-coupling method. The external flow field， skin solid domain and internal flow field in the 3D nacelle model are divided into two computational domains. The wall temperature and heat transfer coefficient on the external surface of anti-icing chamber are taken as the interactive data between the internal and external domains to realize conjugate computation. According to the flow and heat transfer characteristics on the anti-icing surface under the dry and wet air conditions， the mass and energy source terms generated by supercooled water droplet impingement and the 3D runback effect caused by the circumferential asymmetry of nacelle inlet are considered， and the loose-coupling iterative strategies for the dry and wet air conditions are summarized. The results show that under the dry air condition， the calculation of conjugate heat transfer between internal and external flow can converge in 3 rounds of loose-coupling iteration； under the wet air condition， the calculation for nacelle inlet inner surface tends to converge after 4 rounds of iteration.

Key words: nacelle anti-icing, conjugate heat transfer between internal and external flow, engine, surface temperature, convective heat transfer coefficient

CLC Number:

V211.48

Mei ZHENG, Lijuan FENG, Na QIN, Jinge YIN. 3D computational method for conjugate heat transfer between internal and external flow of nacelle anti-icing system[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(1): 627425.

Figures/Tables 21

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Table 1

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类型	参数	数值
飞行状态参数	模拟高度H/m	6 000
	马赫数Ma	0.427
	环境温度T_∞/K	263.55

结冰气象条件	平均水滴直径MVD/μm	20
结冰气象条件	液态水含量LWC/（g·m^-3）	0.43

射流孔出流参数	热气总压P_tot/Pa	250 000
射流孔出流参数	热气总温T_tot/K	555

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3D computational method for conjugate heat transfer between internal and external flow of nacelle anti-icing system

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