Dynamic stall at high Reynolds numbers due to variant types of airfoil motion
Dynamic stall at high Reynolds numbers due to variant types of airfoil motion
复制标题
由于翼型运动的不同类型，高雷诺数下的动态失速
DOI：
10.1088/1742-6596/1618/5/052028
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Hansen, MOL
中科院分区：
文献类型：
--
作者：
Kiefer, J;Brunner, C E;Hultmark, M;Hansen, MOL
在高压风洞中进行了雷诺数Re c= 3.0× 106的非定常翼型实验。中等厚度的NACA 0021翼型在六个单独的斜坡试验中，随着迎角的增加和减小，从静止开始俯仰超过静态失速角。俯仰机动的各种运动类型分别表征为恒定角速度、角加速度和角加速度。斜升试验表明，在所有三种试验情况下，与静态值相比，气动力都有大量的、随时间变化的过剩，并且由于不同的运动类型而表现出明显的时间延迟。同样，斜降实验在很大程度上受到俯仰运动进展的影响，导致升力和阻力的时间发展有明显差异。结果显示为积分力和表面压力分布的时间序列。
Unsteady airfoil experiments were conducted in a high-pressure wind tunnel at chord Reynolds numbers of Re c= 3.0× 10 6. A moderately thick NACA0021 airfoil was pitched from rest beyond the static stall angle in six individual ramp tests with increasing and decreasing angles of attack. The variant types of motion of the pitching maneuvers were characterized by constant angular velocity, angular acceleration and angular jerk, respectively. The ramp-up experiments revealed a substantial and time-dependent excess of the aerodynamic forces from static values in all three test cases and exhibited a distinct time delay as a consequence of the variant motion types. Similarly, the ramp-down experiments were largely impacted by the progression of the pitching motion, resulting in pronounced differences in the temporal development of lift and drag. Results are shown as time series of integrated forces and surface pressure distributions.
斜升运动中机翼周围流动的直接数值模拟
影响因子：
4.6
作者：
M. Rosti;M. Omidyeganeh;A. Pinelli
通讯作者：
A. Pinelli