Fig. 1. The domain of numerical simulation.数值计算区域示意图

Fig. 2. The streamwise evolutions of the excited T-S waves under the localized suction in the pressure-gradient boundary layers of (a) β_H = 0.1, (b) β_H = 0 and (c) β_H = –0.05. 在压力梯度(a) β_H = 0.1, (b) β_H = 0和(c) β_H = –0.05情况下壁面局部吹入边界层内被激发出T-S波波包沿流向呈现增长的演化趋势

Fig. 3. The relationships between the initial amplitudes of the excited T-S waves A_R and the pressure-gradients in the localized blowing and suction boundary layers: (a) Blowing intensity; (b) suction intensity 局部吹入和吸出边界层内被激发出T-S波包初始幅值A_R与压力梯度的关系　(a) 吹入强度; (b) 吸出强度

Fig. 4. The effect of different pressure gradients on x-direction evolutions of the excited T-S waves in the localized blowing boundary layers. (a) F = 40; (b) F = 80 不同压力梯度对壁面局部吹入边界层内被激发出的T-S波沿x向发展的影响 　(a) F = 40; (b) F = 80

Fig. 5. The x-direction evolutions of the amplitude of the excited T-S waves in the local blowing boundary layers (t = 2400): (a) F = 40; (b) F = 80. 壁面局部吹入边界层内被激发出T-S波的幅值A_T-S沿x向的演化(t = 2400)　(a) F = 40; (b) F = 80

Fig. 6. The x-direction evolutions of the growth rate (–α_i) of the excited T-S waves in the local blowing boundary layers (t = 2400): (a) F = 40; (b) F = 80. 壁面局部吹入边界层内被激发出T-S波的增长率(–α_i)沿x向的演化(t = 2400)　(a) F = 40; (b) F = 80

Fig. 7. The relationships between the initial amplitudes of the excited T-S waves A_R and the localized blowing/suction intensity q in different pressure boundary layers 在不同压力梯度情况下壁面局部吹入和吸出边界层内被激发出T-S波波包的初始幅值A_R与局部吹吸强度q之间的关系

Fig. 8. The effects of different pressure gradients on y-direction amplitude profiles of the shape functions of the excited T-S waves in localized blowing boundary layers (x = 300). 压力梯度对壁面局部吹入边界层内被激发出T-S波的特征形状函数的幅值沿y向演变的影响(x = 300)

Fig. 9. The effects of different pressure gradients on y-direction phase profiles of the shape functions of the excited T-S waves in localized blowing boundary layers (x = 300). 压力梯度对壁面局部吹入边界层内被激发出T-S波的特征形状函数的相位沿y向演变的影响(x = 300)