Influence of geometric parameters of leading edge horn-ice on stall characteristics of airfoil

前缘角冰几何参数对翼型失速特性的影响分析研究

¹ School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
² COMAC Shanghai Aircraft Design and Research Institute, Shanghai 201210, China

Received: 19 May 2022

Abstract

The irregular characteristics and geometric randomness of horn-type ice are significant while the behaviors of separation are complex. The mechanism and factor leading to the essential change of stall performance are still not clear. According to actual requirements of airworthiness certification of a large passenger aircraft, a family of horn-type ice shapes with different parameters are constructed based on typical supercritical airfoil and icing environment. By combining with wind tunnel test and numerical simulation methods, the parameter sensitivity of airfoil stall characteristics to the change of ice height and angle is systematically analyzed and the essential influence mechanism of the ice shape parameters leading to the change of separation bubble development under stall process is summarized, which provides a theoretical basis for ice airworthiness certification of large passenger aircraft.

摘要

前缘角冰不规则凸起特征和几何随机性显著, 分离流场特征复杂, 导致翼型失速特性发生本质变化的致因机理和关键因素仍未完全明确。针对大型客机适航审定实际需求, 基于典型翼型及结冰环境, 构造了一族具备不同形貌特征、几何参数彼此关联的角冰冰形。结合数值模拟方法系统分析了翼型失速特性及分离流场特征对冰形高度及角度变化的参数敏感性, 归纳了冰形参数改变导致失速过程分离泡发展规律发生变化的本质影响机理, 为大型客机的结冰适航取证验证工作提供了更为充分的理论依据。