Shan Li, Nan Jiang, Shao-Qiong Yang. Influence of sinusoidal riblets on the coherent structures in turbulent boundary layer studied by time-resolved particle image velocimetry [J]. Acta Physica Sinica, 2019, 68(7): 074702-1
- Acta Physica Sinica
- Vol. 68, Issue 7, 074702-1 (2019)
Fig. 1. Schematic diagram of experimental plates: (a) Smooth plate; (b) riblets; (c) s-riblets实验模型示意图 (a) 光滑平板; (b) 传统直线型沟槽板; (c) 正弦波型沟槽板
Fig. 2. Cross section of s-riblets: (a) Left view; (b) top view正弦波沟槽截面图 (a) 左视图; (b) 俯视图
Fig. 3. Schematic diagram of experimental setup: (a) case 1; (b) case 2.实验装置示意图 (a) case 1; (b) case 2
Fig. 4. Mean velocity profiles in TBL flows over test plates不同壁面流场的流向平均速度剖面
Fig. 5. Distribution of turbulent intensities over test plates不同壁面流场湍流度的分布曲线
Fig. 6. Distribution of Reynolds shear stress over test plates不同壁面流场雷诺切应力的分布曲线
Fig. 7. Correlation coefficients of the streamwise fluctuation in
plane over test plates
不同壁面流场流向脉动速度在
平面内的相关系数
Fig. 9. Conditionally-averaged structure in the
plane: (top)
= 71.1; (bottom)
= 128
平面条件平均相干结构 (上)
= 71.1; (下)
= 128
Fig. 11. Instantaneous streamwise fluctuating velocity in
plane at
= 9.7
平面内不同壁面上流场
= 9.7流向脉动速度云图
Fig. 12. Autocorrelation function of
in the
-direction over test plates
不同壁面上流场
沿展向的自相关函数
|
Table 1.
Basic parameters and results for turbulent boundary layers over test plates.
湍流边界层基本参数及减阻率
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