Abstract Producing metallic wind-tunnel models with integrated pressure taps (i.e. taps formed during the manufacture process) via additive manufacturing (AM) techniques could present several advantages over conventionally manufacturing (CM) pressure-tapped models. However, there are limited reports of AM wind-tunnel models in general. This study describes, in brief, the design and manufacture of a metallic hemispherical wind-tunnel model with integrated pressure taps, produced by Selective Laser Melting (SLM). Mean and unsteady pressure distributions are acquired as a preliminary performance metric for the AM model. The measurements generally agree with previously published results for hemisphere flows at similar experimental conditions; but discrepancies, thought to arise from the model surface finish rather than the SLM process, are evident in the span-wise pressure distributions. Nevertheless, the results are encouraging and extend the bounds of possibility in the use of AM techniques for wind-tunnel model production.

中文翻译：

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金属增材制造风洞模型表面压力测量的初步评估

摘要 通过增材制造 (AM) 技术生产具有集成测压接头（即在制造过程中形成的分接头）的金属风洞模型，与传统制造 (CM) 测压接头模型相比，具有多项优势。然而，一般来说，关于 AM 风洞模型的报道有限。本研究简要介绍了由选择性激光熔化 (SLM) 生产的带有集成测压孔的金属半球风洞模型的设计和制造。获取平均和不稳定压力分布作为 AM 模型的初步性能指标。测量结果与先前公布的类似实验条件下半球流动的结果基本一致；但差异，被认为是由模型表面光洁度而不是 SLM 过程引起的，在展向压力分布中很明显。然而，结果令人鼓舞，并扩展了将 AM 技术用于风洞模型制作的可能性范围。