Table 2: Optimal drag reduction effect with different speed.
Velocity(m/s) |
Depth(mm) |
Drag reduction rate (%) |
10 |
0.05 |
1.99 |
20 |
0.075 |
2.56 |
30 |
0.075 |
3.14 |
40 |
0.075 |
3.02 |