The Characteristics of Turbulence in a Cylindrical Vessel with Large Scale Recirculating Regions: (Measurements of Flow Fields with Temperature Distribution)

Akihiko Ichikawa, Kohichi Hishida, Masanobu Maeda, Seiichi Yokobori

研究成果: Article

抜粋

The characteristics of turbulence in the fields of velocity and temperature of the upper plenum of LMFBR have been investigated to estimate the behavior of thermal diffusion near the upper core structure (UCS). An inlet nozzle of a 1/20 scale experimental vessel provided a co-axial water jet with temperature distribution. The two component velocity measurements were carried out by 3 beam laser Doppler velocimetry, where the temperature was simultaneously measured to obtain correlations among fluctuations of velocity and temperature. The results indicated that the higher temperature jet flow did not mix with colder surroundings up to the bottom of the UCS. Remarkable thermal striping could be observed at the edge of UCS bottom. Sufficient turbulent mixing of momentum and heat was realized after the separation at the edge of UCS bottom, since the higher temperature jet flowed slantingly to the lower temperature surrounding jet.

元の言語English
ページ(範囲)898-903
ページ数6
ジャーナルTransactions of the Japan Society of Mechanical Engineers Series B
52
発行部数474
DOI
出版物ステータスPublished - 1986 1 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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