建立了热轧带钢层流冷却过程中温度场的三维有限元模型，对3 mm厚带钢轧后冷却过程带钢温度场进行模拟计算，得出卷取温度比现场测量值低9.5℃，相对误差为1.42%，验证了模型和假设的合理性。研究了上喷嘴直径对带钢温度的影响，带钢上表面宽度方向上存在2种不同的冷却区域：位于喷嘴正下方层流冷却过程中交替经过冲击区和平流区的区域和位于两喷嘴之间层流冷却过程中只经过平流区的区域，这造成带钢宽度方向上温度分布不均匀。计算结果表明，喷水量保持不变的情况下，存在一个最佳喷嘴直径，使带钢宽度方向上温度分布更均匀。喷水速度保持不变，增加喷嘴的直径有利于带钢宽度上方温度均匀，但增加了喷水量，降低了带钢的卷取温度。
A three-dimensional model was established for CSP hot rolling process to simulate the strip temperature field during laminar cooling from impinging water jets in run-out table (ROT) process. The deviation between simulated and measured coiling temperatures was 9.5℃for 3 mm thick strip, and the relative error was 1.42%, which indicated that the model and assumptions were reasonable. The effect of diameter of upper nozzles on strip temperature was investigated. There were two different cooling regions along the width direction on the upper surface:one was under the nozzle, and the laminar region and impingement region were alternately distributed; the other was the laminar region between nozzles during the laminar cooling process. The results showed that there was an optimum nozzle diameter under the condition of constant cooling water flow rate, making the temperature along the width direction distributed more uniformly.When the water jet speed remained the same, increasing diameter of the nozzle was advantageous to the uniform temperature distri-bution along the width direction, but increased the water flow rate and reduced the strip coiling temperature.
参考文献
| [1] | Wolf D H;Viskanta R;Incropera F P .Local Convective Heat Transfer From a Heated Surface to a Planar Jet of Water With a Nonuniform Velocity Profile[J].Journal of Heat Transfer,1990,112(11):899. |
| [2] | Vader D T;Incropera F P;Viskanta R .Local Convective Heat Transfer From a Heated Surface to an Impinging,Planar Jet of Water[J].International Journal of Heat and Mass Transfer,1991,34(03):611. |
| [3] | Yoshiki Miyasaka;Shigeaki Inada .The Effect of Pure Forced Convection on the Boiling Heat Transfer Between a Two-Dimen-sional Subcooled Water Jet and a Heated Surface[J].J Chem En-gineering Japan,1980,13(01):22. |
| [4] | Natsuo Hatta;Hiroyuki Osakabe .Numerical Modeling for Cool-ing Process of a Moving Hot Plate by a Laminar Water Curtain[J].ISIJ International,1989,29(11):919. |
| [5] | Zumbrunnen D A;Viskanta R;Incropera F P .The Effect of Sur-face Motion on Forced Convection Film Boiling Heat Transfer[J].Transactions of the ASME,1989,111(08):760. |
| [6] | Zumbrunnen D A .Convective Heat and Mass Transfer in the Stagnation Region of a Laminar Planar Jet Impinging on a Mov-ing Surface[J].Journal of Heat Transfer,1991,113(08):563. |
| [7] | Filipovic J;Raymond Viskanta;Incropera F P et al.Thermal Be-havious of a Moving Steel Strip Cooled by an Array of Planar Water Jets[J].STEEL RESEARCH,1992,63(10):438. |
| [8] | Filipovic J;Raymond Viskanta;Incropera F P et al.Cooling of a Moving Steel Strip by an Array of Round Jet[J].Metal Working,1994,65(12):541. |
| [9] | 杨增堂;董希满;蔡庆伍 等.中厚板水幕冷却温度预报和冷却参数设定模型的研究[J].钢铁,1996,31(09):34. |
| [10] | 陈小林,王国栋,田勇,王丙兴,袁国,王昭东.中厚板超快速冷却条件下的温度模型[J].钢铁,2013(10):46-49. |
| [11] | 程杰锋;刘正东;唐广波 .层流冷却过程带钢温度场影响因素模拟分析[J].材料热处理技术,2011,40(10):188. |
| [12] | 程杰锋,刘正东,唐广波.带钢层流冷却过程数值模拟及卷取温度预测分析[J].钢铁,2010(11):57-61. |
| [13] | 王萍,黄贞益,尹桂全,赵学武,王光朋.热轧带钢层流冷却温度控制模型的应用分析[J].钢铁研究学报,2007(04):31-34,61. |
| [14] | 管克智;赵海石;刘萍 .热连轧层流冷却的数学模型[J].北京科技大学学报,1994,16(11):23. |
| [15] | 李东锋 .CSP薄板坯连铸连轧层流冷却过程温度场数值模拟[D].内蒙古科技大学,2005. |
| [16] | 陈银莉,余伟,苏岚,白冰.热轧带钢层流冷却过程中残余应力分析[J].材料热处理学报,2010(06):155-160. |
| [17] | Fried E.Thermal Conduction Contribution to Heat Transfer at Contacts[A].London,UK:Academic Press,1969 |
| [18] | 余伟,卢小节,陈银莉,白冰.热轧带钢在常规层流冷却中温度不均匀性的有限元分析[J].钢铁,2011(04):44-48. |
| [19] | 支颖,刘相华,王国栋.热轧带钢层流冷却中的温度演变及返红规律[J].东北大学学报（自然科学版）,2006(04):410-413. |
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