環状流路内高熱流束加熱ガス流の熱伝達に関する実験的・解析的研究

概要

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Heat transfer experiments have been conducted on 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, heat transfer coefficient in the downstream tends to follow a new correlation: Nu_s=0.071Re_b^<0.6>Pr_b^<0.4> which is independent of the heat flux. Numerical analyses are made using 3 types of turbulence models: k-kL-<uv>^^^-, k-ε-<uv>^^^- and k-ε models. The calculations were compared with the measurements and better agreement was obtained for the k-kL-<uv>^^^- model.
社団法人日本機械学会の論文
1990-01-25