直升机机身对旋翼气动干扰的计算

被引:3
作者
徐国华
李春华
机构
[1] 南京航空航天大学直升机旋翼动力学国家重点实验室
关键词
直升机; 旋翼; 气动干扰; 自由尾迹; 机身;
D O I
10.16356/j.1005-2615.2003.03.004
中图分类号
V212.4 [直升机、旋翼机飞行力学];
学科分类号
摘要
建立了一个全耦合的机身对旋翼气动干扰的迭代计算方法。在该方法中 ,使用自由涡系模型代表旋翼对干扰流场的影响 ,使用三维面元模型替代机身的作用 ,并采用了一个基于“分析数值解匹配”方法的贴近涡 /面干扰模型以改进机身引起尾迹畸变的计算。应用该分析方法 ,以 Maryland大学 4片桨叶的模型旋翼和机身为算例 ,计算了悬停和前飞状态机身对旋翼的气动干扰影响。计算结果表明 ,机身对旋翼气动干扰在悬停和前飞时是不同的 ,且从悬停至前飞 ,机身对旋翼平面某方位的诱导速度存在一个从上洗至下洗的过渡。
引用
收藏
页码:242 / 247
页数:6
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