Structure of Grid Turbulence through a Heated Screen

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

doi:10.1299/kikaib.56.3881

Structure of Grid Turbulence through a Heated Screen

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

Research output: Contribution to journal › Article › peer-review

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 (T_a) 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 language	English
Pages (from-to)	3881-3888
Number of pages	8
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	56
Issue number	532
DOIs	https://doi.org/10.1299/kikaib.56.3881
Publication status	Published - 1990
Externally published	Yes

Keywords

Fluid MeChemics
Forced Convection
Grid Turbulence
Heat Transfer
Turbulent Flow

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

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10.1299/kikaib.56.3881

Cite this

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title = "Structure of Grid Turbulence through a Heated Screen",

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.",

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AU - Ueda, Toshihisa

AU - Hisai, Osamu

AU - Wardana, I. Nyoman Gede

AU - Mizomoto, Masahiko

PY - 1990

Y1 - 1990

N2 - 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.

AB - 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.

KW - Fluid MeChemics

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KW - Grid Turbulence

KW - Heat Transfer

KW - Turbulent Flow

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Structure of Grid Turbulence through a Heated Screen

Abstract

Keywords

ASJC Scopus subject areas

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