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采用非定常雷诺平均Navier-Stokes(URANS)方法计算了18%双圆弧翼型的跨声速抖振特性,分析了翼面激波振荡及流场结构演化的特点,研究了在翼型表面开通气空腔抑制跨声速抖振的可行性,对空腔深度、开缝数目对激波振荡的抑制效果进行了对比分析。计算发现,18%双圆弧翼型的跨声速激波自激振荡只有向前的运动,没有向后的运动,开缝空腔能够抑制翼型跨声速抖振,但对抖振频率影响不大;空腔深度大,抑制效果好,但空腔深度变化对振荡频率影响不大;开2、3、4个槽缝抑制抖振的效果差别不大,开缝数量对抖振频率影响不大。
The unsteady Reynolds-averaged Navier-Stokes (URANS) method was used to calculate the transonic chattering characteristics of 18% bifurcated airfoils. The characteristics of the shock oscillation and the evolution of the flow field in the airfoil were analyzed. The feasibility of air cavity suppression of transonic vibration buffeting is compared with the suppression effect of the cavity depth and the number of slits on shock oscillation. The calculated results show that the transonic shock self-oscillating in 18% double-arc airfoil has only forward movement and no backward movement. The slotted cavity can suppress the airfoil chattering, but the effect on the chattering frequency is not affected Large cavity depth, good suppression effect, but the cavity depth changes have little effect on the oscillation frequency; the effect of suppressing the chattering of the 2,3,4 slots is not very different, and the number of the slits does not affect the frequency of the buffeting Big.