An Experimental/Mathematical Determination of an Effective Heat Transfer Coefficient for Continuously Cast Metal During the Cooling Process

9312734 Bigzadeh该项目的主要目标是在连铸过程中获得二冷区金属丝的有效换热系数。以前的研究表明，该区域的许多冷却工艺对铸件质量有显著影响。将设计和建造两个不同的实验装置，以满足实验研究两个阶段的特殊要求。在实验期间，将测量喷水和喷雾(空气和水)的速度。这将通过三维激光多普勒风速仪和粒子动态分析系统(3-D LDA/PDA)来实现。热电偶和相关的HP数据采集系统将被用来测量温度分布。在液滴撞击过程中，将使用高分辨率相机获取信息。将使用X射线衍射和俄歇实验来确定表面膜的成分和结构。采用适当的曲线拟合方法，建立了连铸二冷区金属板坯传热系数的关联式。通过提高对铸件热传递的了解，可以生产出质量更高、成本更高的金属，从而降低成本，提高金属板材的性能。

9312734 Bigzadeh The main objective of the project is to obtain an effective heat transfer coefficient on a metal strand in the secondary cooling zone during the continuous casting process. Previous research indicates that many cooling processes in this zone have a pronounced effect on the quality of the cast metal. Two different experimental setups will be designed and constructed to satisfy the special requirements of the two phases of the experimental study. During the experiment, spray water and spray (air and water) velocities will be measured. This will be achieved by the three- dimensional Laser Doppler Anemometer and Particle Dynamic Analyzer system (3-D LDA/PDA). Thermocouples with an associated HP data acquisition system will be applied to measure the temperature distribution. A high resolution photo camera will be used to obtain information during the droplet impinging process. X-ray diffraction and Auger experiments will be used in order to determine the composition and the structure of the surface scale. A suitable method of curve fitting will be used to develop the correlation equation for determining the heat transfer coefficient for the metal strand in the secondary cooling zone during the continuous casting process. Improved understanding of the transfer of heat to the castings may allow higher quality continuously cost metals to be produced, reducing the cost and improving the performance of metal sheet stock.