摘要
针对冰晶在温暖环境下运动时固液汽耦合的相变现象,基于欧拉法建立了冰晶粒子的运动相变模型和计算方法。计算了冰晶粒子在强迫对流环境下的融化相变过程,与实验结果对比验证了运动相变模型和计算方法的准确性。针对NACA0012翼型计算了冰晶绕流运动时的热力学特性,得到了冰晶粒子到达撞击表面时的融化状态与收集系数。研究了冰晶粒径大小、初始球形度、气流相对湿度和温度对运动相变的影响。结果表明:冰晶粒子运动相变模型可以有效地评估冰晶结冰风险,冰晶粒子的融化速率主要取决于粒子直径、球形度、气流温度、湿度等因素,环境温度为288 K时冰晶粒子的融化时间为27.5 s,而相同条件下环境温度为302 K时的融化时间仅有5.2 s。
In view of the phase transition phenomenon of solid-liquid-vapor coupling when ice crystals moved in a warm environment,the phase transition model and calculation method of ice crystals were established based on Eulerian method.The melting phase transition processes of ice crystals under forced convection were calculated,and the comparison with the experimental results verified the accuracy of the movement phase transition model and calculation method.The thermodynamic characteristics of ice crystals moving around the NACA0012 airfoil were calculated,and the motion characteristics of ice crystals in a warm environment and the melting ratio were analyzed when they reached the impact surface.The influences of initial particle size,initial particle sphericity,air relative humidity and temperature on the movement phase transition were studied.The results showed that the ice crystal particle movement phase transition model can effectively evaluate the ice crystal icing risk,and the melting rate of ice crystal particles mainly counted on the particle diameter,sphericity,airflow temperature and humidity.When the air temperature was 288 K,the melting time of ice crystal particles was 27.5 s,while the melting time was only 5.2 s when the air temperature was 302 K under the same conditions.
作者
黄平
卜雪琴
林贵平
郁嘉
HUANG Ping;BU Xueqin;LIN Guiping;YU Jia(School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China;Key Laboratory of Icing and Anti/De-icing,China Aerodynamics Research and Development Center,Mianyang Sichuan 621000,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2022年第7期1379-1391,共13页
Journal of Aerospace Power
基金
结冰与防除冰重点实验室开放课题(IADL20210102)
国家重点研发计划(2021YFB2601700)
国家科技重大专项(2017⁃Ⅷ⁃0003⁃0114)。
关键词
冰晶结冰
两相流
融化
相变
欧拉法
ice crystal icing
two-phase flow
melting
phase transition
Eulerian method
