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首页> 外文会议>63rd World Foundry Congress Sep 12-18, 1998 Budapest, Hungary >MODELLING OF FLUID FLOW AND HEAT TRANSFER IN THE CYCLIC PERMANENT MOLD CASTING PROCESS WITH AN AUTOMATED WATER COOLING SYSTEM
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MODELLING OF FLUID FLOW AND HEAT TRANSFER IN THE CYCLIC PERMANENT MOLD CASTING PROCESS WITH AN AUTOMATED WATER COOLING SYSTEM

机译：用自动水冷却系统模拟循环永久铸模过程中的流体流动和传热

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摘要

A three-dimensional simulation program based on the SOLA-VOF technique was developed for modelling the mould filling and solidification sequences in the cyclic casting process. The geometry and mesh diagrams of the casting and the mold were automatically generated using a pre-processor based on the commercial Auto-CAD system. The effects of water cooling channels in the metal mould on the cyclic casting process were examined in order to control the temperature variation in the mould and to improve the soundness of castings. An automatic control system of the water cooling channels was developed based on the computer simulation, by which optimum cooling water can be supplied to maintain a quasi-steady state of the mould temperature during the cyclic casting process, leading to the prevention of hot spots and casting defects. The effects of the water cooling system on the resultant solidification sequences of the castings were simulated by the computer program, and the results were compared with the test castings based on the macroscopic observation and temperature measurements inside the mould and the casting regions during cyclic casting. Microstructural size and hardness values were also evaluated as a function of the distance from the centerline of the casting.
机译：开发了基于SOLA-VOF技术的三维仿真程序，用于对循环铸造过程中的模具填充和凝固顺序进行建模。使用基于商用Auto-CAD系统的预处理器，可以自动生成铸件和模具的几何图和网格图。为了控制铸模中的温度变化并改善铸件的坚固性，研究了金属铸模中水冷通道对循环铸造过程的影响。在计算机仿真的基础上，开发了水冷却通道的自动控制系统，通过该系统，可以提供最佳的冷却水，以在循环铸造过程中保持模具温度的准稳态，从而防止出现热点和铸造缺陷。通过计算机程序模拟水冷却系统对铸件最终凝固顺序的影响，并基于宏观观察和循环铸造过程中结晶器内部和铸件区域的温度测量结果与测试铸件进行比较。还根据与铸件中心线的距离来评估微结构尺寸和硬度值。

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