Thermal structure of turbulent stagnating opposed jets with different temperature

Toshihisa Ueda, Shingo Kakida, Hidenori Yoshimura, Masahiko Mizomoto

Research output: Contribution to journalArticle

Abstract

Fluctuating temperature has been measured using a laser Rayleigh scattering technique along a centerline of turbulent stagnating opposed jets (cold jet velocity: 2 m/s) with different temperatures up to about 400 °C. The temperature signals show that the temperature fluctuation is characterized by spike type fluctuations with a sharp increase or decrease in temperature between hot and cold jets. This indicates that the temperature fluctuation is mainly attributed to the large-scale fluctuations of the boundary between the hot and cold jets. Profiles of mean temperature and rms value of fluctuating temperature can be normalized using a similarity parameter based on the bulk strain rate, characteristic intensity and scale of the turbulence when the temperature difference is less than 200 °C.

Original languageEnglish
Pages (from-to)3634-3640
Number of pages7
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume63
Issue number615
Publication statusPublished - 1997 Nov
Externally publishedYes

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Temperature
temperature
jet flow
Rayleigh scattering
Hot Temperature
spikes
strain rate
Strain rate
temperature gradients
Turbulence
turbulence
Lasers
profiles
lasers

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Thermal structure of turbulent stagnating opposed jets with different temperature. / Ueda, Toshihisa; Kakida, Shingo; Yoshimura, Hidenori; Mizomoto, Masahiko.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 63, No. 615, 11.1997, p. 3634-3640.

Research output: Contribution to journalArticle

Ueda, Toshihisa ; Kakida, Shingo ; Yoshimura, Hidenori ; Mizomoto, Masahiko. / Thermal structure of turbulent stagnating opposed jets with different temperature. In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B. 1997 ; Vol. 63, No. 615. pp. 3634-3640.
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