Structure of Grid Turbulence through a Heated Screen

Toshihisa Ueda, Osamu Hisai, I. Nyoman Gede Wardana, Masahiko Mizomoto

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Measurements of mean values and turbulent intensities of velocity and temperature fluctuations of grid turbulence have been done in a developing region just after an electrically heated screen. The air velocity is set as 1 m/s. The electric current to the screen is adjusted to be the downstream temperature (Ta) 32°C, 100°C or 150°C. A hot wire anemometry with compensation of temperature variation is used to measure velocity with temperature variation. In a developing region, both velocity and temperature distributions become non-uniform at just downstream of the heated screen. The distributions recover gradually to the uniform condition in a downstream region. A turbulent energy dissipates with the distance from the heated screen. The dissipation rate is decreased with increasing air temperature.

Original languageEnglish
Pages (from-to)3881-3888
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume56
Issue number532
DOIs
Publication statusPublished - 1990
Externally publishedYes

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Keywords

  • Fluid MeChemics
  • Forced Convection
  • Grid Turbulence
  • Heat Transfer
  • Turbulent Flow

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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