飞机翼面冰的结构建模与弹性模量预测

doi:10.7527/S1000-6893.2025.31895

Abstract

Abstract:

During aircraft flight， the impact of supercooled water droplets on low-temperature surfaces leads to ice formation， a typical dynamic phase transition process. The resulting wing ice contains air bubbles and pores， which significantly affect its elastic modulus. However， existing research lacks quantitative analysis of the elastic modulus of wing ice， making it difficult to support hazard assessment of ice fracture and shedding during air-worthiness certification. We investigate the elastic modulus of wing ice formed by supercooled drop-let impingement， particularly focusing on the effects of porosity and pore morphology （characterized by sphericity）. By simulating real-flight conditions in the icing wind tunnel， uniaxial compression tests were conducted on wing ice samples at various Mach numbers （0.21–0.33） to measure their elastic modulus. The results demonstrate that the elastic modulus of wing ice is highly correlated with porosity， showing increasingly pronounced anisotropy at higher porosity levels. A predictive model based on porosity and pore sphericity is proposed， effectively simulating elastic modulus variations under different icing conditions. These findings provide theoretical support for predicting elastic modulus of wing ice and assessing fracture and shedding risks.

Key words: wing ice, porosity, pore morphology, anisotropy, elastic modulus

CLC Number:

V211.71

Lin TANG, Xuanshi MENG, Ruidi LIU, Xingshi GU, Xian YI. Structural modeling and elastic modulus prediction of aircraft wing ice[J]. Acta Aeronautica et Astronautica Sinica, 2025, 46(20): 531895.

Figures/Tables 20

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样本	风速/（m·s^-1）	温度/℃	水滴平均粒径/ μm	液态水含量/ （g·m^-3）	结冰高度/m	机翼后掠角/（°）	马赫数
a	80.0	-7	24	0.6	1 900	0	0.24
b	67.1	-23	20	1.0	0	30	0.21
c	67.1	-23	20	1.0	0	0	0.21
d	67.1	-23	20	1.0	0	45	0.21
e	105.6	-10	20	0.5	4 500	0	0.32
f	80.0	-8	30	0.6	1 900	0	0.25

样本	方向	质量/ g	密度/ （kg·m^-3）	孔隙率/%	平均孔隙率/%
a	y	15.535	880	4.35	4.08
a	x	22.575	885	3.80	4.08
b	y	34.755	842	8.48	8.70
b	x	43.336	838	8.91	8.70
c	y	22.951	833	9.46	9.67
c	x	12.472	829	9.89	9.67
d	y	19.025	813	11.63	11.47
d	x	19.664	816	11.30	11.47
e	y	12.905	854	7.17	7.28
e	x	35.439	852	7.39	7.28
f	y	15.675	868	5.65	5.38
f	x	44.891	873	5.11	5.38

冰样本	风速/（m·s^-1）	温度/℃	水滴平均粒径/μm	液态水含量/（g·m^-3）	结冰高度/m
a	100	-5.8	21.7	0.5	3 000
b	100	-25.0	21.2	0.5	3 000

Structural modeling and elastic modulus prediction of aircraft wing ice

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