@article{a6be37d438cb45ec9c7ed1c8302f2e58,
title = "High-Fidelity Simulation of Flow-Induced Vibrations in Helical Steam Generators for Small Modular Reactors",
abstract = "Flow-induced vibration (FIV) is a widespread problem in energy systems as they rely on fluid movement for energy conversion. Vibrating structures may be damaged as fatigue or wear occur. Given the importance of reliable components in the nuclear industry, FIV has long been a major concern in the safety and operation of nuclear reactors. In particular, nuclear fuel rods and steam generators have been known to suffer from FIV and related failures. In this paper we discuss the use of the computational fluid dynamics code Nek5000 coupled to the structural code Diablo to simulate the flow in helical coil heat exchangers and associated FIV. In particular, one-way coupled calculations are performed, where pressure and tractions data are loaded into the structural model. The main focus of this paper is on validation of this capability. Fluid-only Nek5000 large eddy simulations are first compared against dedicated high-resolution experiments. Then, one-way coupled calculations are performed with Nek5000 and Diablo for two data sets that provide FIV data for validation. These calculations were aimed at simulating available legacy FIV experiments in helical steam generators in the turbulent buffeting regime. In this regime one-way coupling is judged sufficient since the pressure loads do not cause substantial displacements. It is also the most common source of vibration in helical steam generators at the low flows expected in integral pressurized water reactors. We discuss validation of two-way coupled experiments and benchmarks toward the simulation of fluid elastic instability. We briefly discuss the application of these methods to grid-to-rod fretting.",
author = "E. Merzari and H. Yuan and A. Kraus and A. Obabko and P. Fischer and J. Solberg and S. Lee and J. Lai and M. Delgado and Y. Hassan",
note = "Funding Information: This research is funded by the NEAMS (Nuclear Engineering Advanced Modelling and Simulation) by the U.S. Department of Energy (DOE). The material also was based in part on work funded by the DOE, Office of Science, under contract DE-AC02-06-CH11357. The Nek5000 simulations were performed on the Argonne Leader Computing Facility in Argonne National Laboratory. The Diablo simulations were performed on the Lawrence Livermore National Laboratory machine “cab.” The submitted manuscript has been created by UChicago Argonne, LLC, operator of Argonne National Laboratory (Argonne). Argonne, a DOE Office of Science laboratory, is operated under contract DE-AC02-06CH11357. The U.S. Government retains for itself, and others acting on its behalf, a paid-up nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, by or on behalf of the Government. The DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan. http://energy.gov/downloads/doe-public-access-plan. Funding Information: This research is funded by the NEAMS (Nuclear Engineering Advanced Modelling and Simulation) by the U.S. Department of Energy (DOE). The material also was based in part on work funded by the DOE, Office of Science, under contract DE-AC02-06-CH11357. The Nek5000 simulations were performed on the Argonne Leader Computing Facility in Argonne National Laboratory. The Diablo simulations were performed on the Lawrence Livermore National Laboratory machine “cab.” The submitted manuscript has been created by UChicago Argonne, LLC, operator of Argonne National Laboratory (Argonne). Argonne, a DOE Office of Science laboratory, is operated under contract DE-AC02-06CH11357. The U.S. Government retains for itself, and others acting on its behalf, a paid-up nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, by or on behalf of the Government. The DOE will provide public Publisher Copyright: {\textcopyright} 2019, {\textcopyright} 2019 UChicago Argonne, LLC, Operator of Argonne National Laboratory.",
year = "2019",
month = jan,
day = "2",
doi = "10.1080/00295450.2018.1490124",
language = "English (US)",
volume = "205",
pages = "33--47",
journal = "Nuclear Technology",
issn = "0029-5450",
publisher = "American Nuclear Society",
number = "1-2",
}