首页> 外文会议>International Conference on Modeling of Casting, Welding and Advanced Solidification Processes >INVERSE ANALYSIS FOR DETERMINATION OF INTERFACIAL HEAT TRANSFER COEFFICIENT IN COMPLEX THREE-DIMENSIONAL SAND CASTING PROCESSES
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INVERSE ANALYSIS FOR DETERMINATION OF INTERFACIAL HEAT TRANSFER COEFFICIENT IN COMPLEX THREE-DIMENSIONAL SAND CASTING PROCESSES

机译:复杂三维砂浇铸过程中界面传热系数的逆分析

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The aim of this work is to determine temperature and shape dependent HTC-value for any casting and mould pair. The inverse method is used here to determine parameters of heat-transfer model using the data of foundry practice. The approach, based on effective methods of parameter identification, allows predicting the interfacial heat transfer coefficients needed as input data for numerical simulation of casting processes. Experimental work with H-shaped castings to determine inner and outer HTC-values consists of thermal measurements during casting solidification. Furthermore, the measured values are compared to the results of a commercial simulation program using these calculated HTC-values. An accurate heat transfer coefficient leads to better modeling of the casting process, and hence the prediction of any macroshrinkage defects, accurate modeling of the extent of the solidification during mould filling, and modeling of the post-filling temperature field in the mould, from which modeling of the solidification stage begins.
机译:这项工作的目的是确定任何铸造和模具对的温度和形状相关的HTC值。这里使用逆方法来使用铸造实践数据来确定传热模型的参数。基于参数识别的有效方法的方法允许预测作为铸造过程的数值模拟的输入数据所需的界面传热系数。与H形铸件的实验工作,以确定内部和外部HTC值由铸造凝固过程中的热测量组成。此外,使用这些计算出的HTC值将测量值与商业仿真程序的结果进行比较。精确的传热系数导致铸造过程的更好建模,因此预测任何宏观加工缺陷,精确建模在模具填充期间的凝固程度,以及模具中填充后温度场的建模,从中凝固阶段的建模开始。

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