80°/65°双三角翼滚转稳定特性预测研究

基金项目:

国家973项目

国家自然科学基金

详细信息

摘要: 在 FL-23风洞中开展了80°/65°双三角翼大迎角下的滚转特性研究,包括静态测力试验,动导数试验和自由滚转试验,通过静态测力试验及动导数试验获得了双三角翼模型在大迎角条件下的滚转力矩特性以及动导数特性,从而对双三角翼大迎角条件下的滚转运动特性进行了预测,最后通过自由摇滚试验对预测结果进行了验证。研究结果表明随着模型迎角的增加,双三角翼呈现不同的滚转运动形态,包括静态稳定、双周期震荡、准极限环摇滚,通过静态气动力及动导数可以较准确地对模型的运动形态及对应的迎角范围进行预测。
- 动导数 /
- 双三角翼 /
- 准极限环 /
- 自激摇滚
Abstract: The free to roll test,static force balance test and dynamic derivative test of 80°/65° double delta wing at high angle of attack are conducted in FL-23 high speed wind tunnel,which dynamic behaviors are forecast based on the static roll moment coefficients and dynamic deriva-tive.The results show that dynamic motions obtained on a double delta wing was free to rotate a-bout its longitudinal axis at different angles of attack.Different dynamic rolling motions inclu-ding the static stability,double periodic oscillation,quasi-limit-cycle rock motion were observed. The forecast results meet the free to roll result well.