【作者】 易贤； 周志宏； 杜雁霞； 朱国林；

【Author】 Yi Xian;Zhou Zhihong;Du Yanxia;Zhu Guolin;China Aerodynamics Research and Development Center;

【机构】 空气动力学国家重点实验室中国空气动力研究与发展中心；

【摘要】 在分析螺旋桨结冰基本物理过程的基础上,通过定义角度因子作为相似参数,并与固定部件结冰试验相似准则相结合,提出了一种进行螺旋桨结冰试验的相似准则,给出了相应的试验参数确定方法。采用数值方法对该准则进行了有效性评估,结果显示:(1)螺旋桨几何尺寸不缩比、其他参数缩比的情况下,可以得到与参考条件吻合的试验水滴收集率、霜冰和明冰;(2)螺旋桨几何尺寸与其他参数都缩比的情况下,试验水滴收集率和霜冰依旧与参考条件的吻合,明冰与参考冰形还存在一定差异,但二者在冰形轮廓和生长趋势上总体一致。以上结果初步说明本文所提出的相似准则是有效的,可以应用于螺旋桨结冰风洞试验,作为试验的理论指导和参数选取依据。更多还原

【Abstract】 .A scaling law for propeller icing test is proposed in this paper.The law is derived from the basic process of ice accretion on propeller surface.It is formed after an similarity parameter named angle factor is defined and the parameter is combined with icing scaling law for fixed components.Numerical method is used for evaluation of the scaling law.The computational results show that when the propeller size keeps unchanged while other parameters are scaled,droplet collection efficiency and both rime and glaze ice shapes of reference icing conditions agree well with that of selected test conditions.When propeller size and other parameters are all scaled,droplet collection efficiency and rime ice shapes results are good,although there are some geometric differences between glaze ice of test conditions and that of reference conditions,the main characteristics of two ice results are similar.The study indicates that the law is valid,and it can be used in propeller icing test as the theoretic basis of the test and its parameters selection.更多还原