动态结冰微观孔隙结构定量分析

doi:10.7527/S1000-6893.2017.121536

流体力学与飞行力学

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动态结冰微观孔隙结构定量分析

李伟斌^1,2, 魏东¹, 杜雁霞¹, 易贤¹, 杨肖峰²

1. 中国空气动力研究与发展中心空气动力学国家重点实验室, 绵阳 621000;
2. 中国空气动力研究与发展中心计算空气动力研究所, 绵阳 621000

收稿日期:2017-06-21 修回日期:2017-07-31 出版日期:2018-02-15 发布日期:2017-07-31
通讯作者: 杜雁霞,E-mail:154552879@qq.com E-mail:yanxiadu@163.com
基金资助:
国家自然科学基金（11472296，11672322）；国家重点基础研究发展计划（2015CB755800）；国家重点研究发展计划（2017YFF0210701）；中国空气动力研究与发展中心风雷青年创新基金（FLYIF20160001）

Quantitative analysis of micro porous structure of dynamic icing

LI Weibin^1,2, WEI Dong¹, DU Yanxia¹, YI Xian¹, YANG Xiaofeng²

1. State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China;
2. Computational Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China

Received:2017-06-21 Revised:2017-07-31 Online:2018-02-15 Published:2017-07-31
Supported by:
National Natural Science Foundation of China (11472296, 11672322); National Key Basic Research Program of China (2015CB755800); National Key Research and Development Program of China(2017YFF0210701); Fenglei Youth Innovation Fund of CARDC (FLYIF20160001)

摘要/Abstract

摘要： 过冷水撞击低温基底结冰是典型的动态过程，易形成气泡孔隙，这一孔隙结构是决定动态结冰热/力学特性的根本因素。针对动态结冰微观孔隙结构定量研究的不足，以风洞结冰显微图像为对象，采用前期提出的变分分割模型，建立了结冰图像孔隙提取方法；基于孔隙提取结果，系统分析不同结冰条件下的孔隙形态、孔径分布等相关结构特征，提出了孔隙类球形、孔径分布连续的结论，并建立了孔隙孔径分布函数，推导了其概率密度函数。结果表明，变分图像分割方法作为孔隙提取的手段具有适用性和优越性，所提孔隙结构相关定量结果与试验数据具有较高的吻合度，基于此开展动态结冰微观结构定量研究是可行的。

关键词: 动态结冰, 结冰风洞, 孔隙结构, 图像分割, 定量分析

Abstract: When super-cooled water droplets impinge a substrate, ice with air pores is formed dynamically. The porou structure is the main factor which influences the thermal and mechanical characteristics of ice. To give a quantitative study of the porous structure of dynamic ice, a pore extraction method is developed based on a variational segmentation model proposed earlier. The method is used to extract the micro image of the ice formed in the ice wind tunnel. The shape, the diameter distribution and other characteristics of the ice formed under different conditions are analyzed systematically. Quantitative study shows that the pore in the ice is sphere-like, and the diameter value is of continuous attribute. The probability density function for the pore diameter is deduced based on the distribution function of the pore diameter. It is clear that the variational segmentation model is feasible and advantageous for pore extraction. The quantitative results are highly consistent with experiment results, and the corresponding quantitative research on the micro-porous structure of dynamic ice can be carried out based on the method proposed.

Key words: dynamic icing, icing wind tunnel, porous structure, image segmentation, quantitative analysis

中图分类号:

V211.71

李伟斌, 魏东, 杜雁霞, 易贤, 杨肖峰. 动态结冰微观孔隙结构定量分析[J]. 航空学报, 2018, 39(2): 121536-121536.

LI Weibin, WEI Dong, DU Yanxia, YI Xian, YANG Xiaofeng. Quantitative analysis of micro porous structure of dynamic icing[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(2): 121536-121536.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

动态结冰微观孔隙结构定量分析

Quantitative analysis of micro porous structure of dynamic icing

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