额外制造的涡轮机冷却特性的可变性

IF 1.1 Q4 ENGINEERING, MECHANICAL Journal of the Global Power and Propulsion Society Pub Date : 2023-07-27 DOI:10.33737/jgpps/162654
Alexander Wildgoose, K. Thole
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引用次数: 2

摘要

增材制造(AM)允许相对于传统制造方法快速制造复杂部件,有助于开发和测试先进的涡轮机冷却方法。同一零件中印刷几何特征的可重复性是保持零件质量、流量和传热所必需的。AM的额外粗糙度对零件质量的影响已被广泛理解,但零件可变性也会导致性能差异,无论是在考虑单个翼型时的局部差异,还是在考虑整个阶段时的全局差异。先前的研究表明,当使用AM打印零件时,某些工艺参数、构建方向和特征尺寸对零件质量的重要性。随着工艺的不断发展,AM的其他伪影也出现了,如构建板上的位置。本文重点介绍了通过考虑简单的直试样或弯曲的叶片前缘,在打印常用冷却功能方面取得的进展。还讨论了存在的可变性以及由此产生的对流传热和压力损失。结果表明,部件之间的粗糙度变化以及部件间的变化随着部件离构建板上的激光源越远而增加。类似地,当样品被放置在离激光源更远的构建板上时,冷却通道的压力损失和热传递的变化和水平也增加。
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Variability in additively manufactured turbine cooling features
Additive manufacturing (AM) allows for the rapid fabrication of complex components relative to conventional fabrication methods aiding in the development and testing of advanced turbine cooling methods. The repeatability of printed geometric features in the same part is required to maintain part quality, flow, and heat transfer. It is widely understood as to the impact that the additional roughness of AM provides with regards to part quality, but part variability also leads to differences in performance either locally in considering a single airfoil or globally when considering an entire stage. Previous studies have shown the importance of certain process parameters, build directions, and feature sizes on the part quality when printing a part using AM. As processes have continued to evolve, other artifacts of AM have arisen such as the location on the build plate. This article highlights the progress that has been made on printing commonly used cooling features by either considering simple straight coupons or a curved vane leading edge. Also discussed is the variability that exists and the resulting convective heat transfer and pressure losses. Results indicate that the variation of roughness between components and the part-to-part variations increased the further the component was from the laser source on the build plate. Similarly, the variation and levels in the pressure loss and heat transfer of the cooling channels also increased when samples were placed further from the laser source on the build plate.
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来源期刊
Journal of the Global Power and Propulsion Society
Journal of the Global Power and Propulsion Society Engineering-Industrial and Manufacturing Engineering
CiteScore
2.10
自引率
0.00%
发文量
21
审稿时长
8 weeks
期刊最新文献
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