Fluid–structure interaction computational analysis of flow field, shear stress distribution and deformation of three-limb pipe

Zhu, Hongjun; Zhang, Wenli; Feng, Guang; Qi, Xing

doi:10.1016/j.engfailanal.2014.04.021

Cited by 25 publications

(6 citation statements)

References 10 publications

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“…The motion of fluid in three-dimensional space is described by a set of partial differential equations, which are mathematical expressions of conservation laws of mass, momentum, and energy. In the engineering field, the Reynolds-Averaged Navier-Stokes (RANS) models are commonly used to simulate the fluid flow inside the pipelines and achieved good results [24][25][26]. In the RANS models, the continuity equation and Navier-Stokes equation can be expressed as:…”

Section: Governing Equationsmentioning

confidence: 99%

Numerical Analysis of the Erosion Mechanism inside the Tube Sockets of Main Steam Thermometers in a Coal-Fired Power Plant

Lv¹,

Yang²,

Wei³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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Leakage occurring in the tube sockets of the main steam thermometers can seriously threaten the safe operation of coal-fired power plants. Here, assuming a 300 MW unit as a relevant testbed, this problem is investigated numerically through solution of the equations of fluid-dynamics in synergy with the mathematical treatment of relevant statistics. The results indicate that the steam can form a large-scale spiral flow inside the tube socket and continuously scour the inner wall. In the model with the protective casing setting angle of 60°, the average tangential fluid velocity can reach up to 4.8 m/s, which is about twice higher than that in the model with the protective casing setting angle of 0°. The wake disturbance generated by the flow around the thermo-sensitive body leads to differences in the fluid motion inside the tube sockets between the upstream and downstream thermometers. These differences are affected by the distance between the thermometers, the setting angle of protective casing, and other factors. The pressure of the main steam inside the tube socket for a R3 thermometer, located outside the curved pipeline, is about 1756 Pa higher than that of the L3 thermometer located outside the straight pipeline, indicating that the secondary flow generated in the curved pipeline is able to provide stronger energy for the large-scale spiral flow inside the tube socket. On the basis of these findings, an improvement scheme for the installation of longitudinal ribs in the tube sockets is proposed. The simulation results show that the average tangential velocity of the fluid within the near-wall area of tube sockets decreases by more than 90%, which should be enough to effectively alleviate the damage to the inner wall caused by high-pressure fluid or particles.

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Section: Governing Equationsmentioning

confidence: 99%

Numerical Analysis of the Erosion Mechanism inside the Tube Sockets of Main Steam Thermometers in a Coal-Fired Power Plant

Lv¹,

Yang²,

Wei³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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“…The external vibration dampers in form of expansion cavities used to reduce the internal pressure fluctuations in areas of high exposure [6][7]. The mathematical model of the "pipe section -a damping device" may be represented with a model of the pipeline section and the model moving fluid in damper, through which is performed external impact [12][13]. The main objective here is the selection of the geometric characteristics of the damper and the analysis of the effectiveness of the pressure reduction [14].…”

Section: E P Kolpak and S E Ivanovmentioning

confidence: 99%

Mathematical and computer modeling vibration protection system with damper

Kolpak¹,

Ivanov²

2015

ams

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The mathematical model of the mechanical system, which is a section of the pipeline with built-in motor pump system and damper for vibration damping, has been developed. The mathematical model is represented by a system of partial differential equations of hydrodynamics for moving fluid in the pipeline and a system of two ordinary differential equations for the damping device. Solution the system of equations is performed using analytical and numerical methods. The numerical solution of the equations of hydrodynamics carried out using the finite element method, implemented in the programming environment of mathematical package freeFEM ++.

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“…This study aims to investigate deformation, stress, and flow conditions. It is concluded that the flow field and deformation of the pipe are highly important for the structural domain [11]. In a study, the slug characteristics of crude oil grades were investigated numerically to assess the effect of change in the stresses.…”

Section: Introductionmentioning

confidence: 99%

Farklı Isı ve Basınç Koşulları Altında Düz Bir Boru İçin Tek Yönlü Akışkan-Yapı Etkileşimleri Analizi

CANBOLAT

2023

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi

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Numerical studies on stress, deformation, and damages due to fluid flow have been highly carried out using Fluid-Structure Interaction (FSI) in recent years. FSI is highly efficient in investigating a solid domain deformed by the fluid flow. In this study, a one-way fluid-structure interaction study is performed by a straight pipe under different pressure and thermal conditions. Here, the thermophysical properties of the fluid and mechanical properties of the solid domain can be subjected to change during fluid flow. An aluminum straight pipe with a 1 mm wall thickness is operated under 1 Bar, 5 Bar, and 10 Bar with three different surface temperatures -10ºC, 20ºC, and 50ºC. This study aims to investigate the structural variation of aluminum by the temperature and pressure change of operating fluid in the pipe. Variation of thermophysical properties of fluid by heated pipe surface is integrated into the numerical analysis by generated functions. Numerical analysis showed that the variation of temperature in operating fluid highly affects the fluid characteristic and the structural response of the solid domain by different temperatures. An increase in the operating pressure caused maximum deformation to approximately %100 from 1 Bar to 5 Bar, and approximately %120 from 1 Bar to 10 Bar for the adiabatic process as expected but in the heating conditions stress is nearly three times higher than cooling conditions. As a result, one-way FSI solutions are highly effective in investigating the deformed solid domain as a result of flow, thermal, and operating conditions.

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Fluid–structure interaction computational analysis of flow field, shear stress distribution and deformation of three-limb pipe

Cited by 25 publications

References 10 publications

Numerical Analysis of the Erosion Mechanism inside the Tube Sockets of Main Steam Thermometers in a Coal-Fired Power Plant

Numerical Analysis of the Erosion Mechanism inside the Tube Sockets of Main Steam Thermometers in a Coal-Fired Power Plant

Mathematical and computer modeling vibration protection system with damper

Farklı Isı ve Basınç Koşulları Altında Düz Bir Boru İçin Tek Yönlü Akışkan-Yapı Etkileşimleri Analizi

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