October 12, 2024
Yasser Amini

Yasser Amini

Academic Rank: Associate professor
Address:
Degree: Ph.D in Mechanical Engineering
Phone: 07731222171
Faculty: Faculty of Engineering

Research

Title Corrugated pipes conveying fluid: Vibration and instability analysis
Type Article
Keywords
Fluid-conveying; corrugated pipe; Stability; Dynamics; Euler-Bernoulli beam; Fluid-structure interaction; Bifurcation ; Flutter
Journal OCEAN ENGINEERING
DOI https://doi.org/10.1016/j.oceaneng.2022.113507
Researchers Farhang Daneshmand (Second researcher) , Yasser Amini (Third researcher)

Abstract

The global flexibility and local rigidity of corrugated pipes have made them a good candidate in many engineering applications such as aerospace, oil and gas industries, heat and cooling systems, compact heat exchangers, etc. In this study, dynamic responses of corrugated clamped-clamped pipes conveying fluid are investigated. The governing equations of the system are derived by using the Hamiltonian principle based on the Euler-Bernoulli beam hypothesis. Non-uniformity of the flow velocity profile is considered in the formulation for both laminar and turbulent fluid flow. So, the flow-profile-modification factor for laminar flow and space-dependent mean velocity for turbulent flow are proposed. For spatial discretization of these equations, the finite element method is used. The effects of several parameters including fluid velocity, the corrugation length, as well as corrugation amplitude on the stability of the pipe system are examined. Natural frequencies of the pipe in hydrostatic flow conditions and critical flow velocities are determined for a vast range of parameters. Numerical results show that the stability of the system is significantly affected by the corrugation length and amplitude.