Flow Induced Vibration of Power and Process Plant Components

Au‐Yang, M. K.

doi:10.1115/1.801667

Cited by 54 publications

(19 citation statements)

References 0 publications

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“…For a multi-span beam with both ends of each span simply supported, the natural frequency is given by [Au-Yang, 2001]:…”

Section: Natural Frequency and Mode Shape Functionmentioning

confidence: 99%

“…To obtain the root mean square response of the mid-plane to axial flow, three approaches described by Au-yang [2001] can be used. All of them are consistent with each other.…”

Section: Combination Of Axial Flow and Cross Flowmentioning

confidence: 99%

“…Let us assume that the annular fuel and the solid fuel have the same ratio of grid diameteral clearance to fuel outer diameter D. Then, the contact stress parameters are equal in the annular fuel and the solid fuel according to Au-Yang [2001]. Thus, the following equation can be used to rate annular fuel against solid fuel, yielding the results in Table 8.17: It is clear that the annular fuel has a smaller surface stress than the solid fuel.…”

Section: Impact Wearmentioning

confidence: 99%

“…The damping ratios for tubes in water for various water densities and support types are listed in Table 8.1 [Au-Yang, 2001]. …”

Section: Damping Ratiomentioning

confidence: 99%

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High Performance Fuel Desing for Next Generation Pressurized Water Reactors

Kazimi¹,

Hejzlar²

2006

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“…For a multi-span beam with both ends of each span simply supported, the natural frequency is given by [Au-Yang, 2001]:…”

Section: Natural Frequency and Mode Shape Functionmentioning

confidence: 99%

“…To obtain the root mean square response of the mid-plane to axial flow, three approaches described by Au-yang [2001] can be used. All of them are consistent with each other.…”

Section: Combination Of Axial Flow and Cross Flowmentioning

confidence: 99%

Section: Impact Wearmentioning

confidence: 99%

“…The damping ratios for tubes in water for various water densities and support types are listed in Table 8.1 [Au-Yang, 2001]. …”

Section: Damping Ratiomentioning

confidence: 99%

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High Performance Fuel Desing for Next Generation Pressurized Water Reactors

Kazimi¹,

Hejzlar²

2006

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“…Of special interest are heat exchanger geometries in general (Kakaç et al (2012)) and nuclear reactor core arrays specifically (Païdoussis (1982)). The problem of fluid-elastic instabilities in both cross-flow (Pettigrew and Taylor (2003)) and axial flow (Au-Yang (2001); Païdoussis (1998)) has been investigated analytically, experimentally and numerically. Most analyses focus on the buckling behaviour of a single cylinder (Modarres-Sadeghi et al (2007)) or of an array of cylinders.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of large-scale vortices in an array of cylinders in axial flow

Moerloose

Aerts

Ridder

et al. 2018

Journal of Fluids and Structures

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Axial flow around an array of cylinders is commonly encountered in nuclear reactors and heat exchangers. This geometry is subject to important flow instabilities. The chaotic flow fluctuations due to turbulence are not the only source of vortex structures: large-scale vortices have also been observed, both experimentally and numerically. The periodic pressure fluctuations caused by the coherent vortex structures are possibly a source of fretting and fatigue in the aforementioned applications. In order to comprehend this phenomenon, LargeEddy Simulations are performed on a numerical domain containing a single rigid cylinder with periodic boundary conditions, representative for a cylinder in an infinite square array. The research in this paper mainly focuses on the influence of the cylinder spacing, which is analyzed by calculating the Cross Spectral Density (CSD) function of the cylinder wall pressure for different cylinder spacings. The spectral analysis shows that the amplitude of the pressure fluctuations increases up to a well-determined intercylinder gap, after which it decreases exponentially for incrementing gap size. With the weakening of the instability, the location on the cylinder circumference where the maximum pressure amplitude occurs, changes as well. Finally, it is shown that the coherent vortices are transported as a whole at a convection speed which is dependent on the cylinder spacing. An updated model for this convection speed is proposed.

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