Experimental investigation on vortex-induced vibration and solid-structure impact of a near-bottom horizontal flexible pipeline in oblique shear flow

The influences of Re (Reynolds number) on the response of vortex induced vibration (VIV) have been studied by previous researches, which indicate the influences should not be ignored. However, due to the limitation of experimental facilities and complexity of the cases, the explicit influence of Re on VIV is still not fully known. Meanwhile, the industry standards also do not supply design reference taking account of Re effects quantitatively. In present work, an innovative dimensionless parameter (denoted as “inertia-viscosity”) is proposed to displace the Re in the dimensionless system, in order to clarify the individual effect of Re. With this method, comparing tests are concisely carried out, and the effectiveness and feasibility are demonstrated. Through the comparing of tests, several remarkable results are obtained.

Download Full-text

Experimental investigation of the suppression of vortex-induced vibration in four cylinders arranged in a square under different spacing ratios

Journal of Marine Science and Technology ◽

10.1007/s00773-019-00654-z ◽

2019 ◽

Vol 25 (2) ◽

pp. 467-481

Author(s):

Min Lou ◽

Gang Qian ◽

Run Li

Keyword(s):

Experimental Investigation ◽

Vortex Induced Vibration ◽

Four Cylinders

Download Full-text

Experimental investigation of vortex-induced vibration of long marine risers

Journal of Fluids and Structures ◽

10.1016/j.jfluidstructs.2005.07.014 ◽

2005 ◽

Vol 21 (3) ◽

pp. 335-361 ◽

Cited By ~ 259

Author(s):

A.D. Trim ◽

H. Braaten ◽

H. Lie ◽

M.A. Tognarelli

Keyword(s):

Experimental Investigation ◽

Vortex Induced Vibration ◽

Marine Risers

Download Full-text

Numerical and Experimental Investigation of Secondary Flow in a High Speed Compressor Stator

Volume 1: Turbomachinery ◽

10.1115/95-gt-229 ◽

1995 ◽

Author(s):

Y. Ohkita ◽

H. Kodama ◽

O. Nozaki ◽

K. Kikuchi ◽

A. Tamura

Keyword(s):

Numerical Simulation ◽

Experimental Investigation ◽

Shear Flow ◽

Secondary Flow ◽

Total Pressure ◽

High Speed ◽

Experimental Studies ◽

Three Dimensional ◽

Three Dimensional Flow ◽

Performance Recovery

A series of numerical and experimental studies have been conducted to understand the mechanism of loss generation in a high speed compressor stator with inlet radial shear flow over the span. In this study, numerical simulation is extensively used to investigate the complex three-dimensional flow in the cascades and to interpret the phenomena appeared in the high speed compressor tests. It has been shown that the inlet radial shear flow generated by upstream rotor had a significant influence on the stator secondary flow, and consequently on the total pressure loss. Redesign of the stator aiming at the reduction of loss by controlling secondary flow has been carried out and the resultant performance recovery was successfully demonstrated both numerically and experimentally.

Download Full-text