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首页> 外文期刊>AIChE Journal >Numerical Modeling of the Cooling Cycle and Associated Thermal Stresses in a Melt Explosive Charge
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Numerical Modeling of the Cooling Cycle and Associated Thermal Stresses in a Melt Explosive Charge

机译：熔体炸药中冷却循环及相关热应力的数值模拟

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A comprehensive simulation tool is developed to describe and optimize the cooling cycle in the melt-casting of Composition B. It comprises a multiphysics approach tackling heat, mass, and momentum transfers involved in the casting process. The highly nonlinear solidification step and development of thermal stresses are included. A V & V (Verification and Validation) approach was adopted whereby the model was verified against a benchmark problem and tested with a simple cylindrical geometry. Then, the approach was applied to a 105 mm caliber artillery shell and simulation results were in close agreement with experimental measurements. The model is equipped with a CZM function to account for adhesion between the solidified cast and the mold. During cooling, separation is possible and the size and location of gaps, depending on shrinkage and adhesion, are successfully emulated. The importance of controlled solidification is pointed out, especially regarding steep temperature gradients within the shell. (C) 2016 American Institute of Chemical Engineers AIChE J, 62: 3797-3811, 2016
机译：开发了一种综合的仿真工具来描述和优化组合物B的熔铸中的冷却循环。它包括解决铸造过程涉及的热量，质量和动量传递的多物理场方法。包括高度非线性的固化步骤和热应力的产生。采用了V＆V（验证和确认）方法，从而针对基准问题验证了模型并使用简单的圆柱几何体进行了测试。然后，将该方法应用于105毫米口径的炮弹，仿真结果与实验测量结果非常吻合。该模型配备了CZM功能，以解决凝固铸件和模具之间的粘附问题。在冷却过程中，可以进行分离，并且可以成功模拟间隙的大小和位置（取决于收缩率和附着力）。指出了控制凝固的重要性，特别是对于壳内陡峭的温度梯度。 （C）2016美国化学工程师学会AIChE J，62：3797-3811，2016

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