Hydro-thermal-mechanical analysis of thermal fatigue in a mixing tee

Chapuliot, S.; Gourdin, C.; Payen, T.; Magnaud, J. P.; Monavon, A.

doi:10.1016/j.nucengdes.2004.09.011

Cited by 139 publications

(48 citation statements)

References 3 publications

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“…When high-and low-temperature flows are mixing in the mixing tee, high-cycle thermal fatigue may occur. Fatigue cracks have been often found downstream from the mixing tee, for example in the Civaux-1 (Chapuliot et al, 2005) and more recently in U.S nuclear power plants (McDevitt et al, 2015). Hence thermal fatigue is one of the major degradation mechanisms that must be considered in nuclear power plant management.…”

Section: Introductionmentioning

confidence: 99%

Conjugate numerical simulation of wall temperature fluctuation at a T-junction pipe

Utanohara¹,

Miyoshi²,

Nakamura³

2018

Mechanical Engineering Journal

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Thermal fatigue cracks may occur in a T-junction pipe due to the mixing of hot and cold fluids. To develop an evaluation method for thermal fatigue, the authors previously performed a mixing tee experiment called the TCubic experiment. In this study, a fluid-structure coupled simulation for conjugate heat transfer was carried out to investigate the predictive performance of the flow and temperature fields and temperature fluctuation on the pipe inner surface at a mixing tee of the T-Cubic experiment. The computational domain included 304 type stainless steel pipe as well as the working fluid of water. Time-averaged velocity and temperature were reproduced well over the entire computational domain. Although velocity fluctuation intensity at a distance from the wall was relatively smaller than experimental data, the simulation could reproduce the trend of the experimental data, especially the velocity fluctuation intensity peak near the wall. The temperature fluctuation intensity was also larger than the experimental data, though the tendency could be reproduced by the simulation. The temperature fluctuation intensity on the pipe inner surface is the most important parameter for thermal fatigue and though it was 20% to 36% larger than the experimental data at its peak, the tendency was reproduced to a certain extent. The fluid temperature in the numerical simulation fluctuated at almost the same level from 0.1 Hz to 10 Hz, but high frequency components attenuated and low frequency components around 0.1 Hz remained on the pipe inner surface.

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Section: Introductionmentioning

confidence: 99%

Conjugate numerical simulation of wall temperature fluctuation at a T-junction pipe

Utanohara¹,

Miyoshi²,

Nakamura³

2018

Mechanical Engineering Journal

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“…The T-junction is one of the typical components with a considerable potential of thermal fatigue (Chapuliot et al 2005;Hu & Kazimi 2006;Lee et al 2009) and is used in many thermohydraulic systems such as combustion engines, turbines, exhaust systems, reheat systems and so on. The T-junction configuration consists of two pipe systems intersected perpendicularly, and they are called main and branch pipes.…”

Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation of Turbulent Flow in a T-Junction

Kim

Jeong

2012

Numerical Heat Transfer, Part A: Applications

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“…For example, excessive thermal fatigue resulting from the turbulent mixing of fluids at differing temperatures can lead to a complete destruction of the system [12]. It is argued that thermal fatigue is the most common cause of unexpected failures within Nuclear Power Plants (NPP's) particularly within piping components such as mixing tee's [29].…”

Section: Nuclear Applicationsmentioning

confidence: 99%

A Review of Embedded Large Eddy Simulation for Internal Flows

Holgate

Skillen

Craft

et al. 2018

Arch Computat Methods Eng

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When scale-resolving simulation approaches are employed for the simulation of turbulent flow, computational cost can often be prohibitive. This is particularly true for internal wall-bounded flows, including flows of industrial relevances which may involve both high Reynolds number and geometrical complexity. Modelling the turbulence induced stresses (at all scales) has proven to lack requisite accuracy in many situations. In this work we review a promising family of approaches which aim to find a compromise between cost and accuracy; hybrid RANS-LES methods. We place particular emphasis on the emergence of embedded large eddy simulation. These approaches are summarised and key features relevant to internal flows are highlighted. A thorough review of the application of these methods to internal flows is given, where hybrid approaches have been shown to offer significant benefits to industrial CFD (relative to an empirical broadband modelling of turbulence). This paper concludes by providing a cost-analysis and a discussion about the emerging novel use-modalities for hybrid RANS-LES methods in industrial CFD, such as automated embedded simulation and multi-dimensional coupling.

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Hydro-thermal-mechanical analysis of thermal fatigue in a mixing tee

Cited by 139 publications

References 3 publications

Conjugate numerical simulation of wall temperature fluctuation at a T-junction pipe

Conjugate numerical simulation of wall temperature fluctuation at a T-junction pipe

Large Eddy Simulation of Turbulent Flow in a T-Junction

A Review of Embedded Large Eddy Simulation for Internal Flows

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