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research-article

A Simulation Study on the Dynamic Stability of a Fluid-Conveying Pipe with a Constant Velocity Leakage

[+] Author and Article Information
Shuai Meng

State Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University
mengshuai001@sjtu.edu.cn

Ye Li

State Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University
ye.li@sjtu.edu.cn

Xuefeng Wang

State Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University
wangxuef@sjtu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4036657 History: Received November 22, 2016; Revised April 14, 2017

Abstract

Motivated by the fact that a leaking pipe can lose or gain energy from the leaking flow, this study focus on the non-conservative leaking flow effect on the dynamic stability of a flexible pipe with a constant velocity leakage. It employs a two dimensional non-linear longitudinal and lateral coupling model, and the leakage effect is accounted for by virtual work due to virtual momentum transport at the leaking point. The equations of motion are solved by Galerkin-based multi-mode approach and the Houbolt’s finite difference time integration. It demonstrates that when there is a leaking flow, a stable pipe can be refined or destabilized via a static pitchfork bifurcation, and a buckling pipe can be stabilized or deteriorated into a worse divergence condition. The critical leaking flow velocities and the excited buckling modes depend on the leaking fluid mass and the leak’s position. This study may provide some insights to assist the LDS (Leak Detection System) of a pipe transporting high-pressure oil or gas in modern engineering.

Copyright (c) 2017 by ASME
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