Stability, Receptivity, and Sensitivity Analyses of Buffeting Transonic Flow over a Profile
Stability, Receptivity, and Sensitivity Analyses of Buffeting Transonic Flow over a Profile
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DOI：
10.2514/1.j053588
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发表时间：
2015-07
期刊：
影响因子：
2.5
通讯作者：
F. Sartor;C. Mettot;D. Sipp
中科院分区：
文献类型：
--
作者：
F. Sartor;C. Mettot;D. Sipp
考虑了奥特15a超临界剖面上的跨音速流动。通过数值模拟和大迎角下的整体稳定性分析，研究了激波与湍流边界层的相互作用。数值模拟与先前的研究结果一致，并成功地再现了被称为冲击自助餐的高振幅自持续冲击振荡。与前人的研究结果一致，发现了由线性化的Navier-Stokes方程的不稳定全局模态驱动的自助餐现象。伴随全局模态分析表明，流态最易受谐波力的位置为型线吸力侧、激波脚上游边界层内、激波脚下游的再循环泡内以及撞击激波脚的右侧特征区。特征值敏感性分析表明，在边界层或再环流区域施加定常的顺流力都能有效地解决这一问题。
A transonic flow over the OAT15A supercritical profile is considered. The interaction between the shock wave and the turbulent boundary layer is investigated through numerical simulation and global stability analysis for a wide range of angles of attack. Numerical simulations are in good agreement with previous studies and manage to reproduce the high-amplitude self-sustained shock oscillations known as shock buffet. In agreement with previous results, it is found that the buffet phenomenon is driven by an unstable global mode of the linearized Navier–Stokes equations. Analysis of the adjoint global mode reveals that the flow is most receptive to harmonic forcings on the suction side of the profile, within the boundary layer upstream of the shock foot, in the recirculation bubble downstream of the shock foot, and on the right characteristic that impinges the shock foot. An eigenvalue sensitivity analysis shows that a steady streamwise force applied either in the boundary layer or in the recirculation regi...