Pressure fluctuation characteristics of complex turbulent flow in a single elbow with small curvature radius for a sodium-cooled fast reactor

Shinji Ebara, Yuta Aoya, Tsukasa Sato, Hidetoshi Hashizume, Yuki Kazuhisa, Kosuke Aizawa, Hidemasa Yamano

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

A multi-elbow piping system is adopted for the Japan sodium-cooled fast reactor (JSFR) cold-legs. Flow-induced vibration (FIV) is considered to appear due to complex turbulent flow with very high Reynolds number in the piping. In this study, pressure measurement for a single elbow flow is conducted to elucidate pressure fluctuation characteristics originated from turbulent motion in the elbow, which lead potentially to the FIV. Two different scale models, 1/7- and 1/14-scale simulating the JSFR cold-leg piping, are tested experimentally to confirm whether a scale effect in pressure fluctuation characteristics exists. A distinguishing peak can be seen in each power spectrum density (PSD) profile of pressure fluctuation obtained in and downstream of the flow separation region for both scaled models. When nondimensionalized, the PSD profiles show good correspondence regardless of scale model and even of Reynolds number simulated in this study.

Original languageEnglish
Pages (from-to)111102-1-111102-7
JournalJournal of Fluids Engineering, Transactions of the ASME
Volume132
Issue number11
DOIs
Publication statusPublished - 2010 Nov

Keywords

  • Cold-leg piping
  • Elbow flow
  • Fast reactor
  • Flow separation
  • Flow-induced vibration
  • Pressure fluctuation

ASJC Scopus subject areas

  • Mechanical Engineering

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