Models

Lock-in region

Starting reduced velocity

(m/s)

ending reduced velocity

(m/s)

reduced velocity interval

(m/s)

Bare

5.293

8.009

2.716

Empty

5.639

8.017

2.378

0.8 D gap ratio

0.5 D length

5.710

7.775

2.065

1 D length

6.058

7.435

1.377

2 D length

7.486

8.873

1.387

0.5 D gap ratio

0.5 D length

6.418

8.144

1.726

1 D length

8.138

9.518

1.380

2 D length

8.917

9.962

1.045