It has been recognized in recent years that high-altitude atmospheric ice crystals pose a threat to aircraft engines in flight. It is believed that ice can accrete inside the core compressor, although the mechanism by which this occurs remains poorly understood. To model ice crystal accretion, an estimate of the proportion of the impinging ice and water that sticks to a surface (the sticking efficiency) is required. This Paper presents data from experiments undertaken using an axisymmetric test article in an altitude ice crystal wind tunnel. A 35 deg half-angle nose was used for a parametric study of Mach number, total water content, wet bulb temperature, and particle size distribution. An assessment of the response of a multiwire probe used for measuring liquid water content is also presented. A shadowgraphy technique was used to measure the ice accretion growth rate on the nose. The results show that sticking efficiency has a strong dependency on particle melt ratio. Erosion is shown to be correlated with particle size, Mach number, and surface angle. New semi-empirical models are presented for sticking probability and erosion.

近年来已经认识到，高空大气冰晶对飞行中的飞机发动机构成威胁。可以相信，尽管核心机理尚不清楚，但冰仍会积聚在核心压缩机内部。为了模拟冰晶的积聚，需要估计粘附在表面的撞击冰和水的比例（粘附效率）。本文介绍了使用轴对称测试物品在海拔高度冰晶风洞中进行的实验获得的数据。35度半角鼻子用于马赫数，总含水量，湿球温度和粒径分布的参数研究。还介绍了用于测量液态水含量的多线探针的响应评估。影影技术被用来测量鼻子上冰的积聚增长率。结果表明，粘附效率对颗粒熔融比具有强烈的依赖性​​。侵蚀与颗粒大小，马赫数和表面角度有关。提出了新的粘滞概率和侵蚀的半经验模型。