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1. 西安交通大学能源与动力工程学院,西安,710049
2. 中国空气动力研究与发展中心结冰与防除冰重点实验室,四川,绵阳,621000
3. 西安交通大学深低温技术与装备教育部重点实验室,西安,710049
Online First:10 October 2024,
Published:2024
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ZHONG Fuhao, LIU Senyun, LIU Xiufang, et al. Numerical Study on Mixed-Phase Ice Crystal Icing on Airfoils[J]. 2024, 58(10): 168-177.
ZHONG Fuhao, LIU Senyun, LIU Xiufang, et al. Numerical Study on Mixed-Phase Ice Crystal Icing on Airfoils[J]. 2024, 58(10): 168-177. DOI: 10.7652/xjtuxb202410015.
为探究冰晶与过冷水滴共存时的混合相结冰特性
基于FENSAP-ICE结冰计算平台
以NACA0012翼型为研究对象
采用阻力系数对非球形冰晶的运动过程进行修正
考虑了冰晶黏附效应和侵蚀效应的影响
建立了欧拉框架下冰晶运动、碰撞、黏附、结冰和侵蚀全物理过程的混合相结冰数值计算方法。分析了冰晶质量浓度(ice water content
IWC)、液态水质量浓度(liquid water content
LWC)以及冰晶黏附和侵蚀效应对结冰形态和结冰厚度的影响规律
对比了NTI和NRC 两种冰晶黏附模型的适用条件。研究结果表明:当总水含量(total water content
TWC)一定时
随着冰水含量比IWC与LWC之比的增加
结冰覆盖面积逐渐减小
最大结冰厚度先增大后减小
冰形由冠状逐渐变为尖角状
当IWC与LWC分别为0.4 g·m
-3
和1.0 g·m
-3
时
驻点处的结冰厚度达到最大值; 对于高IWC工况
NRC黏附模型的驻点结冰厚度更接近实验结果
误差为7.2%; 对于低IWC工况
NTI模型与NRC模型的驻点结冰厚度接近; 侵蚀作用主要影响翼型驻点附近的区域
IWC或LWC的增大均会加剧侵蚀效应。研究可为飞行器高效防除冰系统的设计提供理论依据。
To explore the characteristics of mixed-phase icing when ice crystals and supercooled water droplets coexist
a numerical study is conducted utilizing the FENSAP-ICE simulation platform. The NACA0012 airfoil is selected as the subject of the study. The motion of non-spherical ice crystals is adjusted by modifying the drag coefficient
and both ice crystal adhesion and erosion effects are taken into consideration. Within the Euler framework
a comprehensive numerical c
alculation method is developed to simulate the complete physical process of ice crystal motion
collision
adhesion
accretion
and erosion. The influence of ice water content(IWC)
liquid water content(LWC)
as well as ice crystal adhesion and erosion effects on the shape and thickness of icing is analyzed. The applicability conditions of two ice crystal adhesion models
namely NTI and NRC
are compared. The research findings suggest that
when maintaining a constant total water content(TWC)
an increase in the ratio of IWC to LWC leads to a gradual reduction in the ice coverage area. Additionally
the maximum ice thickness initially increases and then decreases
accompanied by a transition in ice shape from crown to angular. The maximum ice thickness at the stagnation point is achieved when IWC and LWC are 0.4 g·m
-3
and 1.0 g·m
-3
respectively. Under high IWC conditions
the NRC adhesion model demonstrates a stagnation point ice thickness that closely aligns with experimental results
with an error of 7.2%. Conversely
under low IWC conditions
both the NTI and NRC models yield similar stagnation point ice thicknesses. The erosion effect primarily affects the region near the airfoil's stagnation point
and an increase in IWC or LWC intensifies this erosion effect. This study provides a theoretical foundation for the design of an efficient anti-icing system for aircrafts.
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