高温鋼材水スプレー冷却時の表面温度 400〜800℃間での熱伝達率

概要

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Heat transfer coefficients (α) of water-spray cooling in the region of steel surface temperature (θ_s) 400 to 800℃ are numerically expressed as a function of θ_s and impinged water flux (W), by using published water-spray cooling data (7 papers, 112 data) measured with scale-coated steel specimens by many researchers. In the region of θ_s : 400 to 800℃ and W : 10 to 2000l/m^2・min, α_w is represented by the following equation, α_w=2.292×10^8・W^<0.616>θ_s^<2.445> where α_w is value of α without radiation heat transfer, [α_w] being kcal/m^2・h・℃. In addition, are discussed features of exponents of W and θ_s, comparison of the above equation with other researchers' one, α in the film boiling region, and α calculation methods for θ_s between 125℃ and about 1200℃.
社団法人日本鉄鋼協会の論文
1983-02-01