Experimental and Theoretical Investigations on Heat Transfer of Strongly Heated Turbulent Gas Flow in an Annular Duct

  • FUJII Sadao
    Nuclear System Division, Kawasaki Heavy Industries, Ltd., Tokyo Design Office
  • AKINO Norio
    Department of High Temperature Engineering, Tokai Establishment, Japan Atomic Energy Research Institute
  • HISHIDA Makoto
    Department of High Temperature Engineering, Tokai Establishment, Japan Atomic Energy Research Institute
  • KAWAMURA Hiroshi
    Mechanical Engineering, Faculty of Science and Technology, Science University of Tokyo
  • SANOKAWA Konomo
    Department of High Temperature Engineering, Tokai Establishment, Japan Atomic Energy Research Institute

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Heat transfer experiments have been conducted for strongly heated gas flow in an annular duct. Special attention is paid to the laminar-turbulent transitional region. The results show that laminarization was not observed within the range of the experiments, although this phenomenon took place in a heated circular pipe when other conditions were the same. Above a certain heat flux, the heat transfer coefficient in the downstream region tends to follow a new correlation : Nu_s=0.071Re^<0.6>_b Pr^<0.4>_b, which is independent of the heat flux. Numerical analyses are made using three types of turbulence models : k-kL-<uv>^^^-, k-ε-<uv>^^^-, and k-εmodels. The calculations were compared with the measurements, and better agreement was obtained for the k-kL-<uv>^^^- model.

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詳細情報 詳細情報について

  • CRID
    1573950401921114752
  • NII論文ID
    110002494347
  • NII書誌ID
    AA10680596
  • ISSN
    09148817
  • 本文言語コード
    en
  • データソース種別
    • CiNii Articles

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