Modeling Lift Hysteresis on Pitching Airfoils with a Modified Goman–Khrabrov Model
Modeling Lift Hysteresis on Pitching Airfoils with a Modified Goman–Khrabrov Model
复制标题
使用改进的 Goman-Khrabrov 模型对俯仰翼型的升力迟滞进行建模
DOI：
10.2514/1.j054937
复制
发表时间：
2017
期刊：
影响因子：
2.5
通讯作者：
C. Strangfeld
中科院分区：
文献类型：
--
作者：
David R. Williams;Florian Reissner;D. Greenblatt;H. Müller;C. Strangfeld
在两种不同厚度比的对称翼型上进行了风洞试验，以检验Goman-Khrabrov型模型预测俯仰机动过程中升力系数变化的能力。这两种翼型之间的主要区别在于，在准定常机动过程中，薄翼型的升力曲线没有滞后，而厚翼型在16 ° <α <22 °的范围内观察到静态滞后。当机翼俯仰时，两种翼型的升力系数都表现出动态滞后。静态滞后的存在对周期性俯仰过程中的升力响应有很大影响，必须在模型中考虑。引入了Goman-Khrabrov模型的一个修改版本，该模型捕捉了厚翼型的静态迟滞行为和动态迟滞的大尺度特征，即使当厚翼型处于深度失速条件下。在最大攻角下，观察到模型和实验之间的一些偏差，…
Wind-tunnel experiments were conducted on two symmetric airfoils with different thickness ratios as a test of the ability of Goman–Khrabrov-type models to predict the lift coefficient history during pitching maneuvers. The primary difference between the two airfoils was that the thin airfoil had no hysteresis in its lift curve during quasi-steady maneuvers, but static hysteresis was observed with the thick airfoil over a range of 16<α<22 deg. Both airfoils exhibited dynamic hysteresis in the lift coefficient when the wing was pitching. The existence of static hysteresis had a strong effect on the lift response during periodic pitching and must be accounted for in the model. A modified version of the Goman–Khrabrov model was introduced that captured the static hysteresis behavior and the large-scale features of the dynamic hysteresis for the thick airfoil, even when the thick airfoil was in a deep-stall condition. Some deviations between model and experiment were observed at the highest angles of attack, ...