Structural analysis of compact heat exchanger samples fabricated by additive manufacturing
参考中译:添加法制备紧凑型换热器试件的结构分析


          

刊名：International Journal of Pressure Vessels and Piping
作者：G. Zilio（Thermal Fluid Flow Group - T2F, Department of Mobility Engineering, Federal University of Santa Catarina）
M. J. Teixeira（Thermal Fluid Flow Group - T2F, Department of Mobility Engineering, Federal University of Santa Catarina）
M. V. V. Mortean（Thermal Fluid Flow Group - T2F, Department of Mobility Engineering, Federal University of Santa Catarina）
F. G. Brandao（CENPES, Petrobras, Cidade Universitaria）
T. T. Pontin（Thermal Fluid Flow Group - T2F, Department of Mobility Engineering, Federal University of Santa Catarina）
J. L. G. Oliveira（Thermal Fluid Flow Group - T2F, Department of Mobility Engineering, Federal University of Santa Catarina）
K. V. Paiva（Thermal Fluid Flow Group - T2F, Department of Mobility Engineering, Federal University of Santa Catarina）
刊号：712C0008
ISSN：0308-0161
出版年：2022
年卷期：2022, vol.199
页码：104714-1--104714-12
总页数：12
分类号：TK2
关键词：Compact heat exchanger；3D printing；Additive manufacturing
参考中译：紧凑型换热器；3D打印；添加剂制造
语种：eng
文摘：Compact heat exchangers are extensively employed in the industry due to their flexibility, geometric configuration characteristics, and the low ratio between heat transfer area by volume. Usually, these heat exchangers are exposed to high thermal and pressure gradients, which can cause structural failures during the operation. A new fabrication method employing additive manufacturing was evaluated to produce that equipment in this context. Twelve samples of 316L stainless steel that simulated a heat exchanger geometry were fabricated in two machines. A test rig was constructed for hydrostatic tests to evaluate their structural integrity through strain gauges. Some samples were submitted to pressures up to 700 bar without any leakage. The results show that printing orientation is crucial to the process, which influences material properties and, consequently, the von Mises stress observed. Properties on vertical orientation present lower stress levels. The influence of heat treatment was also verified, showing that machining processes locally alter mechanical properties. In parallel, a numerical study was developed for structural evaluation. It was observed that the pressurization of the distribution chamber strongly influences the stress of prototype channels. The high-stress region does not surpass the material yield strength for the test pressure. Furthermore, any deformation on the experimental prototype was not observed, indicating that the geometric characteristics guarantee a structural integer of the heat exchanger core. It is highlighted that the numerical results proved a good adherence to experimental results.
参考中译：紧凑型换热器因其具有灵活性、几何构型、换热面积比低等特点，在工业中得到了广泛的应用。通常，这些热交换器暴露在较高的温度和压力梯度下，这可能会导致运行过程中的结构故障。在这种情况下，评估了一种采用添加制造的新制造方法来生产该设备。在两台机器上制作了12个模拟换热器几何形状的316L不锈钢样品。搭建了水压试验试验台，通过应变片对其结构完整性进行评价。一些样品被提交到高达700巴的压力下，没有任何泄漏。结果表明，印刷方向对工艺至关重要，影响材料性能，从而观察到von Mise应力。垂直方向上的特性表现出较低的应力水平。热处理的影响也得到了验证，表明加工过程局部地改变了机械性能。同时，还开展了结构评估的数值研究。观察到，配电室的加压对原型通道的应力有很大影响。高应力区不超过测试压力下的材料屈服强度。此外，实验样机没有观察到任何变形，表明换热器的几何特性保证了换热器核心的结构完整性。结果表明，数值结果与实验结果吻合较好。



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