<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>To illustrate the vibration characteristics of a rotating pipe in flow, experiments were conducted for a pipe in flow, a rotating pipe in still water and a rotating pipe in flow. For the pipe in flow without rotation, the trajectory diagram is ‘8’ shaped. For the rotating pipe in still water, a multiple frequency component was induced, and a ‘positive direction whirl’ was found. For the flow and rotation, at a flow velocity of 0.46 m/s, the vibration is dominated by the combination of flow and rotation. With an increase in rotating frequency, the trajectory of the rotating pipe varies from an ‘8’ shape to a circular shape and the ‘reverse direction whirl’ is induced, which is different from ‘positive direction’ in still water. The vibration frequency ratio increases uniformly with flow velocity. At a flow velocity of 1.02 m/s, at which the frequency is close to the theoretical natural frequency, the vibration frequency ratio is f*≈1. Predominantly governed by vortex-induced vibration (VIV), the vibration behavior of a rotating pipe subjected to fluid flow conditions has been found to exhibit complete vanishing of whirl. The vibration characteristics of a rotating pipe in flow are studied by the experiments which is benefit for structural drilling design.</p>
</abstract>

To illustrate the vibration characteristics of a rotating pipe in flow, experiments were conducted for a pipe in flow, a rotating pipe in still water and a rotating pipe in flow. For the pipe in flow without rotation, the trajectory diagram is ‘8’ shaped. For the rotating pipe in still water, a multiple frequency component was induced, and a ‘positive direction whirl’ was found. For the flow and rotation, at a flow velocity of 0.46 m/s, the vibration is dominated by the combination of flow and rotation. With an increase in rotating frequency, the trajectory of the rotating pipe varies from an ‘8’ shape to a circular shape and the ‘reverse direction whirl’ is induced, which is different from ‘positive direction’ in still water. The vibration frequency ratio increases uniformly with flow velocity. At a flow velocity of 1.02 m/s, at which the frequency is close to the theoretical natural frequency, the vibration frequency ratio is f*≈1. Predominantly governed by vortex-induced vibration (VIV), the vibration behavior of a rotating pipe subjected to fluid flow conditions has been found to exhibit complete vanishing of whirl. The vibration characteristics of a rotating pipe in flow are studied by the experiments which is benefit for structural drilling design.

Experimental Study on Vibration of a Rotating Pipe in Still Water and in Flow

Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics

Department of Mechanics and Engineering Structure, Wuhan University of Technology

Department of Ocean Technology, Policy and Environment

Polish Maritime Research

This work is licensed under the Creative Commons Attribution 4.0 International License.

{"article-title":"Experimental Study on Vibration of a Rotating Pipe in Still Water and in Flow"}

To illustrate the vibration characteristics of a rotating pipe in flow, experiments were conducted for a pipe in flow, a rotating pipe in still water and a...

Experimental Study on Vibration of a Rotating Pipe in Still Water and in Flow

Published Online: Apr 19, 2023

Page range: 65 - 77

DOI: https://doi.org/10.2478/pomr-2023-0007

Keywords
flow-induced vibration, rotating pipe, vibration frequency, whirl, VIV

© 2023 Xinge Geng et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Experimental Study on Vibration of a Rotating Pipe in Still Water and in Flow

Published Online: Apr 19, 2023

Page range: 65 - 77

DOI: https://doi.org/10.2478/pomr-2023-0007

Keywordsflow-induced vibration, rotating pipe, vibration frequency, whirl, VIV

© 2023 Xinge Geng et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
flow-induced vibration, rotating pipe, vibration frequency, whirl, VIV