Evaluation of turbulence modeling approaches for the prediction of cross-flow in a helical tube bundle
Name
NURETH18_MIT_ANL_SG_V1_final.pdf
Description
Accepted version
Size
1.23 MB
Format
Adobe PDF
Checksum (MD5)
198049ffcae5f7ef7add927cbcdb639b
Author(s)
Feng, Jinyong
Acton, Michael (Michael John)
Baglietto, Emilio
Date Issued
October 2018
Journal
18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics
Publisher
American Society of Mechanical Engineers
Citation
Feng, Jinyong et al. “Evaluation of turbulence modeling approaches for the prediction of cross-flow in a helical tube bundle.” In Proceedings of the 18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH), Portland, United States, Aug 18 to Aug 23 2019, ASME, Paper number ICONE26-82486 © 2019 The Author(s)
Version
Author's final manuscript
Abstract
Helical coil steam generators are being adopted in a number of advanced nuclear reactor designs because of their increased heat transfer efficiency and compactness when compared to traditional configurations. Due to the limited operational experience of helical coil steam generators, and the expected high cost of dedicated experiments, it is imperative to demonstrate the capability of modeling the flow phenomena present in such systems, in order to support their development. Computational fluid dynamics (CFD) is ideally suited for this problem, due to its high resolution and accuracy. However, traditional low-cost URANS turbulence models have shown limited applicability for cross-flow in helical tube bundles. On the other hand, LES methods provide high-accuracy and high-fidelity data with prohibitively high computational cost for design use. Hybrid, and second-generation URANS turbulence models aim to bridge the gap between URANS and LES, by resolving additional turbulence, without the extremely high cost of LES. In this work, the recently proposed second-generation model STRUCT is compared to classic URANS turbulence formulations in terms of pressure drop, turbulent kinetic energy and flow velocity fields generated from a high-fidelity LES simulation in Nek5000. The STRUCT model produces accurate predictions for all relevant quantities, demonstrating high potential for reproducing helical tube bundle flow phenomena accurately, at an affordable computational cost. Further work should extend the validation scope to a wider range of flow velocities and geometrical arrangements, to confirm the demonstrated applicability of the method.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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