Axial vibration in a poppet valve based on fluid–structure interaction

2014 ◽  
Vol 229 (17) ◽  
pp. 3266-3273 ◽  
Author(s):  
Wei Min ◽  
Hong Ji ◽  
Linfeng Yang
Keyword(s):  
Dynamic Characteristics ◽  
Static Pressure ◽  
Fluid Structure Interaction ◽  
Jet Impingement ◽  
Viscous Force ◽  
Axial Vibration ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Hydraulic Force ◽  
Pressure Area

In this paper, fluid–structure interaction modeling of poppet fluid was presented, response of poppet under the action of step and periodic excitation signal was simulated, and dynamic characteristics of viscous force and hydraulic force on poppet surface were analyzed. The investigation indicates that poppet surface before valve port can be divided into jet impingement area and static pressure area under the action of submerged jet, and the dynamic characteristics of hydraulic force on these areas and axial vibration of poppet are closely related with length of jet impingement and poppet structure. Furthermore, for hydraulic force on jet impingement area, hydraulic force on static pressure area, and viscous force, if amplitude and phase have a reasonable configuration, axial vibration amplitude of poppet can decrease greatly.

Structural Optimization of Buckling Load in Fluid-Structure Interaction Problems

2002 ◽  
Author(s):  
Hiroki Umeda ◽  
Hirohisa Noguchi
Keyword(s):  
Static Pressure ◽  
Fluid Structure Interaction ◽  
Buckling Load ◽  
Navier Stokes ◽  
Geometrically Nonlinear ◽  
Navier Stokes Equation ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Newton Raphson ◽  
Raphson Method

This paper presents a procedure for the sensitivity analysis of buckling load in fluid-structure interaction problems. In the formulation, the buckling of thin structures subjected to the pressure of viscous flow is modeled, where the geometrically nonlinear equation and the Navier-Stokes equation should be considered. These equations are solved by the strong coupling formulation and the Newton-Raphson method. In order to confirm the validity of this procedure, the arch subjected to only the static pressure of fluid is analyzed. Finally, simple optimization considering fluid-structure interaction is performed using the calculated sensitivity along with the steepest descend method and the satisfactory result is obtained.

Modal Test of Scaled-Down Reactor Internals in SMART Considering the Fluid-Structure Interaction

2011 ◽  
Author(s):  
Seungho Lim ◽  
Kyungrok Ha ◽  
Kyoung-Su Park ◽  
No-Cheol Park ◽  
Young-Pil Park ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Seismic Analysis ◽  
Fluid Structure Interaction ◽  
Mass Effect ◽  
Mode Shapes ◽  
Structural Dynamic ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Standard Design ◽  
Reactor Internals

The System-integrated Modular Advanced ReacTor (SMART) is a small modular integral-type reactor for the seawater desalination and small-scaled power generation under development in Korea. Although the SMART is innovative reactor with a sensible mixture of the proven technology and advanced design features aimed at enhanced safety, there is no valid prototype which can specify the structural dynamic characteristics of reactor internals. Thus, extensive research for the technology verification and standard design approval are in progress. One of them is to perform the dynamic characteristics identification of reactor internals. Especially, it is focused on the added mass effect caused by the fluid-structure interaction because the reactor internals is submerged in the reactor coolant. The extracted dynamic characteristics such as the natural frequencies and the vibratory mode shapes can be used as the basis on further dynamic analysis, for example, seismic analysis and a postulated pipe break analysis.

Research on Fluid-Structure Interaction Dynamic Characteristics of Steam Generator Heat Exchanger Tubes

2012 ◽  
Vol 482-484 ◽  
pp. 183-187
Author(s):  
Li Na Zhang ◽  
Hui Zhao ◽  
Min Shan Liu
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Steam Generator ◽  
Dynamic Characteristics ◽  
Fluid Structure Interaction ◽  
Heat Exchanger Tube ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Steam Generator Tubes ◽  
Exchanger Tube

For heat exchanger tube of steam generator, the relation between heat exchanger tube and fluid is typical fluid-structure interaction problem. Flow induced vibration has been found so far to be responsible for fatigue damage and failure of steam generator tubes, which will result in large economic loss and radioactive pollution. So the steam generator tubes are the weakest link in the primary coolant loop. Based on the synthesis of all sorts of factors influencing the dynamic characteristics of steam generator heat transfer tubes, establishing the heat transfer tube model, research on the weakening effect of fluid hole on fluid, the natural frequencies of the heat transfer tubes are analyzed under different fluid holes and fluid hole distance by numerical simulation.

Dynamic characteristics identification of reactor internals in SMART considering fluid–structure interaction

2013 ◽  
Vol 255 ◽  
pp. 202-211 ◽  
Author(s):  
Youngin Choi ◽  
Seungho Lim ◽  
Byung-Han Ko ◽  
Kyoung-Su Park ◽  
No-Cheol Park ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Reactor Internals

scholarly journals Axial Vibration Characteristics of Fluid-Structure Interaction of an Aircraft Hydraulic Pipe Based on Modified Friction Coupling Model

2020 ◽  
Vol 10 (10) ◽  
pp. 3548
Author(s):  
Lingxiao Quan ◽  
Shichao Che ◽  
Changhong Guo ◽  
Haihai Gao ◽  
Meng Guo
Keyword(s):  
High Speed ◽  
Fluid Shear Stress ◽  
Weighting Function ◽  
Fluid Structure Interaction ◽  
Friction Model ◽  
Vibration Characteristics ◽  
Axial Vibration ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Wide Range

This paper aims at studying the axial vibration response characteristics of Fluid-Structure Interaction (FSI) vibration of aircraft hydraulic pipe when considering the friction coupling. Based on the Brunone empirical model and the Zielke weighting function, an expression of fluid shear stress of the hydraulic pipeline is presented for a wide range of Reynolds number, and the friction model of the FSI 14-equation for high-speed and high-pressure hydraulic pipeline is modified. On this basis, a left-wing hydraulic pipeline of the C919 airplane is taken as the verification object and modeled, then the FSI vibration 14-equation is solved using frequency-domain transfer matrix method in MATLAB to analyze the modal and the axial vibration characteristics of the pipeline. Ultimately, a test experiment is given and discussed by being compared with the numerical simulation results, which confirmed the correctness of the friction model and demonstrated that the analytic accuracy of axial velocity response of FSI vibration could be improved by considering the friction coupling.

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