采用k-ω SST湍流模型,对加装涡流发生器（VG）的S809翼段的深度动态失速过程进行数值模拟,探究三角形、梯形、矩形3种VG对翼段深失速的影响。从翼段升阻力系数、表面压力系数和VG流向涡3个角度对比分析。结果表明：矩形VG对深失速抑制效果最好,最大升力系数为1.812,失速攻角为20.224°,较光滑翼段,升力系数提升11.25%,失速角延迟了1.622°。源于深失速时,矩形VG的流向涡速度最快、涡核尺寸最大、涡量最强,对边界层的影响最大,更有利于抑制流动分离。
Abstract
Using k-ω SST turbulence model is used to numerically simulate the deep dynamic stall process of the S809 wing segment equipped with a vortex generator （VG）, and to explore the effects of three types of VGs, triangular, trapezoidal, and rectangular, on the deep stall of the wing segment. Comparative analysis is conducted from three perspectives： lift drag coefficient, surface pressure coefficient, and VG flow vortex of the wing segment. The results show that the rectangular VG has the best effect on deep stall suppression, with a maximum lift coefficient of 1.812 and a stall attack angle of 20.224°. Compared to the smooth wing segment, the lift coefficient is increased by 11.25%, and the stall angle is delayed by 1.622°. When originating from deep stall, the rectangular VG has the fastest flow vortex velocity, the largest vortex core size, and the strongest vorticity, which has the greatest impact on the boundary layer and is more conducive to suppressing flow separation.
关键词
数值模拟 /
流动控制 /
风力机 /
翼型 /
动态失速 /
涡流发生器
Key words
numerical simulation /
flow control /
wind turbines /
wing /
dynamic stall /
vortex generator
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基金
国家自然科学基金（52376179; 51876054）
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