基于计算流体力学的A357合金大型复杂构件所用淬火槽内介质流场分布模拟

摘要

The flow distribution in quench tank for heat treatment of A357 alloy large complicated components was simulated using FLUENT computational fluid dynamics (CFD) software. The flow velocity and the uniformity of flow field in two types of quench tanks (with or without agitation system) were calculated. The results show that the flow field in the quench tank without agitation system has not evident regularity. While as for the quench tank with agitation system, the flow fields in different parameters have certain regularity. The agitation tanks have a distinct advantage over the system without agitation. Proper process parameters were also obtained. Finally, the tank model established in this work was testified by an example from publication. This model with high accuracy is able to optimize the tank structures and can be helpful for industrial production and theoretical investigation in the fields of heat treatment of large complicated components.%基于FLUENT计算流体力学软件，模拟A357铝合金大型复杂构件所用淬火槽内介质流场分布情况。分别采用两类淬火槽结构(未置搅拌系统和配置搅拌系统)，对槽内介质流速及流场均匀性进行模拟计算。结果表明，对于未置搅拌系统的淬火槽，其内部介质流场未发现明显的规律性；而对于配置搅拌系统的淬火槽，在不同工艺参数条件下，其内部介质流场均具有一定的规律性。可知，配置搅拌系统的淬火槽优势明显。另外，获得了流场均匀性较合适工艺参数。最后，通过与文献中的结果进行对比，验证所建计算模型，该模型具有很高的计算精度，能对淬火槽的结构进行优化，从而为大型构件的热处理提供技术支持和理论指导。