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

连续铸造金属冷却过程中有效传热系数的实验/数学测定

• 批准号: 9312734
• 负责人: Ebrahim Bigzadeh
• 金额: --
• 依托单位: Florida International University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-06-15 至 1997-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9312734&HistoricalAwards=false
• 关键词: Experimental; Mathematical; Determination; Effective; Heat

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.

9312734 Bigzadeh该项目的主要目标是在连铸过程中获得二次冷却区金属连铸坯的有效传热系数。以前的研究表明，在这个区域的许多冷却过程对铸造金属的质量有显着的影响。两个不同的实验装置将被设计和建造，以满足实验研究的两个阶段的特殊要求。在实验期间，将测量喷雾水和喷雾（空气和水）速度。这将通过三维激光多普勒风速仪和颗粒动态分析仪系统（3-D LDA/PDA）来实现。热电偶与相关的高压数据采集系统将被用于测量温度分布。高分辨率照相机将用于获得液滴撞击过程中的信息。将使用X射线衍射和俄歇实验来确定表面垢的组成和结构。采用合适的曲线拟合方法，建立了连铸过程中二冷区金属铸坯传热系数的相关方程。提高对热传递到铸件的理解可以允许生产更高质量的连续成本金属，降低成本并提高金属板材的性能。