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第12期 汪贺模等:水流量对热轧钢板层流冷却过程对流换热系数的影响 ·1425· 1.0p a 1.0 -0.9m2.h1 0.9 0.9 8848 -0-1.6m.h1 号0.8 88。 a…2.1m3.hl 出0.7 -0.9m3.h- ◆1.6mh 0.5 0.6 42.1m3.hl 0.4 05020030400500600700800 0.3 200300400500600 表面温度℃ 表面温度℃ 图8不同水流量条件下距离驻点不同位置处换热系数比与表面温度关系.(a)d=70mm:(b)d=210mm Fig.8 Relationships between the heat transfer coefficient ratio and surface temperature at different water flow rates and at different locations:(a)d= 70mm;(b)d=210mm 量为1.6~2.1m3·h-1条件下换热系数比基本相同, Alloys.Beijing:Metallurgical Industry Press,1994 H210为0.74~0.87. (谭真,郭广文工程合金热物性.北京:治金工业出版社, 1994) 4结论 [5]Park H M.Chung OY,Lee J H.On the solution of inverse heat (1)热轧钢板层流冷却过程中,对流换热系数 transfer problem using the Karhunen-oeve Galerkin method.IntJ 与表面温度呈非线性关系.表面温度高于300℃ Heat Mass Transfer,1999,42(1)127 6]Taler J,Zima W.Solution of inverse heat conduction problems 时,对流换热系数值随表面温度下降逐渐增大;表面 using control volume approach.Int J Heat Mass Transfer,1999, 温度低于300℃时,对流换热系数随表面温度急剧 42(6):1123 增加. Kim S K,Lee W I.Solution of inverse heat conduction problems (2)层流冷却过程中,对流换热系数不仅与表 using maximum entropy method.Int/Heat Mass Transfer,2002. 面温度有关,而且与冷却位置有关.在距离驻点 45(2):381 8] Hon Y C,Wei T.A fundamental solution method for inverse heat 70mm内,水流量对对流换热系数与表面温度变化 conduction problem.Eng Anal Boundary Elem,2004,28(5):489 规律没有影响. Woodfield P L,Monde M,Mitsutake Y.Implementation of ar (3)在0~70mm内,水流量对对换热系数比与 analytical two dimensional inverse heat conduction technique to practi- 表面温度关系没有影响,换热系数比为0.8~0.92. cal problems.Int J Heat Mass Transfer,2006,49 (1/2):187 远离驻点70mm外,随着远离冲击区驻点处距离的 [0]Wang Z D,Yuan G,Wang G D,et al.Heat transfer coefficient 增加,对流换热系数比减小,冷却位置对换热系数影 of hot rolled strip during ultra fast colin process.ron Steel, 2006,41(7):54 响增大. (王昭东,袁国,王国栋,等.热带钢超快速冷却条件下的对 参考文献 流换热系数研究.钢铁,2006,41(7):54) [1]Liu S D.Zhang X M,Huan Z B,et al.Quench sensitivity of [11]Kim H K,Oh S I.Evaluation of heat transfer coefficient during 7055 aluminum alloy.J Cent South Unie Sci Technol,2006,37 heat treatment by inverse analysis.J Mater Process Technol, (5):846 2001,112(2/3):157 (刘胜胆,张新明,黄振宝,等.7055铝合金的淬火敏感性研 [12]Liu Z D,Fraser D,Samarasekera I V.Experimental study and 究.中南大学学报:自然科学版,2006,37(5):846) calculation of boiling heat transfer on steel plates during runout Li S K,Hui S X,Ye W J,et al.Effect of cooling rate on the table operation.Can Metall (2002,41(1)63 microstructure and properties of TAl5 ELI alloy.Rare Met Mater [13]Nallathambi A K,Specht E.Estimation of heat flux in array of Eng,2007,36(5):786 jets quenching using experimental and inverse finite element (李士凯,惠松骁,叶文君,等.冷却速度对TA15EL山合金组 method.J Mater Process Technol,2009,209 (12/13):5325 织与性能的影响.稀有金属材料与工程,2007,36(5):786) [14]Xu F C,Gadala M S.Heat transfer behavior in the impingement B]Wei G,Dong X M,Wang J M.Study on the coefficient of convec- zone under circular water jet.Int J Heat Mass Transfer,2006,49 tive heat transfer of the plate at high temperature during water wall (21/22):3785 cooling.Iron Steel,1994,29(1)22 [15]Leocadio H,Passos JC.Silva A F C.Heat transfer behavior of a (韦光,董希满,王进民。水幕冷却高温钢板对流换热系数的 high temperature steel plate cooled by a subcooled impinging circular 研究.钢铁,1994,29(1):22) water jet /The 7th ECI International Conference on Boiling Heat 4]Tan Z,Guo G W.Thermo-Physical Properties of Engineering Transfer.Florianopolis,2009:3第 12 期 汪贺模等: 水流量对热轧钢板层流冷却过程对流换热系数的影响 图 8 不同水流量条件下距离驻点不同位置处换热系数比与表面温度关系. ( a) d = 70 mm; ( b) d = 210 mm Fig. 8 Relationships between the heat transfer coefficient ratio and surface temperature at different water flow rates and at different locations: ( a) d = 70 mm; ( b) d = 210 mm 量为 1. 6 ~ 2. 1 m3 ·h - 1 条件下换热系数比基本相同, H210为 0. 74 ~ 0. 87. 4 结论 ( 1) 热轧钢板层流冷却过程中,对流换热系数 与表面温度呈非线性关系. 表面温度高于 300 ℃ 时,对流换热系数值随表面温度下降逐渐增大; 表面 温度低于 300 ℃ 时,对流换热系数随表面温度急剧 增加. ( 2) 层流冷却过程中,对流换热系数不仅与表 面温度有关,而且与冷却位置有关. 在距离驻点 70 mm内,水流量对对流换热系数与表面温度变化 规律没有影响. ( 3) 在 0 ~ 70 mm 内,水流量对对换热系数比与 表面温度关系没有影响,换热系数比为 0. 8 ~ 0. 92. 远离驻点 70 mm 外,随着远离冲击区驻点处距离的 增加,对流换热系数比减小,冷却位置对换热系数影 响增大. 参 考 文 献 [1] Liu S D,Zhang X M,Huan Z B,et al. Quench sensitivity of 7055 aluminum alloy. J Cent South Univ Sci Technol,2006,37 ( 5) : 846 ( 刘胜胆,张新明,黄振宝,等. 7055 铝合金的淬火敏感性研 究. 中南大学学报: 自然科学版,2006,37( 5) : 846) [2] Li S K,Hui S X,Ye W J,et al. Effect of cooling rate on the microstructure and properties of TA15 ELI alloy. Rare Met Mater Eng,2007,36( 5) : 786 ( 李士凯,惠松骁,叶文君,等. 冷却速度对 TA15 ELI 合金组 织与性能的影响. 稀有金属材料与工程,2007,36( 5) : 786) [3] Wei G,Dong X M,Wang J M. Study on the coefficient of convec￾tive heat transfer of the plate at high temperature during water wall cooling. Iron Steel,1994,29( 1) : 22 ( 韦光,董希满,王进民. 水幕冷却高温钢板对流换热系数的 研究. 钢铁,1994,29( 1) : 22) [4] Tan Z,Guo G W. Thermo-Physical Properties of Engineering Alloys. Beijing: Metallurgical Industry Press,1994 ( 谭真,郭广文. 工程合金热物性. 北京: 冶金工业出版社, 1994) [5] Park H M,Chung O Y,Lee J H. On the solution of inverse heat transfer problem using the Karhunen-Loeve Galerkin method. Int J Heat Mass Transfer,1999,42( 1) : 127 [6] Taler J,Zima W. Solution of inverse heat conduction problems using control volume approach. Int J Heat Mass Transfer,1999, 42( 6) : 1123 [7] Kim S K,Lee W I. Solution of inverse heat conduction problems using maximum entropy method. Int J Heat Mass Transfer,2002, 45( 2) : 381 [8] Hon Y C,Wei T. A fundamental solution method for inverse heat conduction problem. Eng Anal Boundary Elem,2004,28( 5) : 489 [9] Woodfield P L,Monde M,Mitsutake Y. Implementation of an analytical two dimensional inverse heat conduction technique to practi￾cal problems. Int J Heat Mass Transfer,2006,49( 1 /2) : 187 [10] Wang Z D,Yuan G,Wang G D,et al. Heat transfer coefficient of hot rolled strip during ultra fast cooling process. Iron Steel, 2006,41( 7) : 54 ( 王昭东,袁国,王国栋,等. 热带钢超快速冷却条件下的对 流换热系数研究. 钢铁,2006,41( 7) : 54) [11] Kim H K,Oh S I. Evaluation of heat transfer coefficient during heat treatment by inverse analysis. J Mater Process Technol, 2001,112( 2 /3) : 157 [12] Liu Z D,Fraser D,Samarasekera I V. Experimental study and calculation of boiling heat transfer on steel plates during runout table operation. Can Metall Q,2002,41( 1) : 63 [13] Nallathambi A K,Specht E. Estimation of heat flux in array of jets quenching using experimental and inverse finite element method. J Mater Process Technol,2009,209( 12 /13) : 5325 [14] Xu F C,Gadala M S. Heat transfer behavior in the impingement zone under circular water jet. Int J Heat Mass Transfer,2006,49 ( 21 /22) : 3785 [15] Leocadio H,Passos J C,Silva A F C. Heat transfer behavior of a high temperature steel plate cooled by a subcooled impinging circular water jet / / The 7th ECI International Conference on Boiling Heat Transfer. Florianópolis,2009: 3 ·1425·
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