Manufacturability without supports in design studies for additive manufacturing (AM) brings many advantages such as time, cost, part surface quality, and design freedom. It is thought that the geometries that can be produced without support will help the more widespread use of AM technologies. In this study, the unsupported manufacturability and efficiency research of conformal cooling channel (CCC) geometries created in cylindrical, wide oval, drop, hexagonal, narrow oval, and pentagonal cross-sections were conducted in the direct metal laser sintering (DMLS) system. The study offers innovation in terms of showing the usability of different channel geometries in CCC applications. The study shows that the pentagon form has the most efficient cooling capacity among the comparatively handled geometries. The results are obtained by a computational fluid dynamics (CFD) analysis study on computer-aided design (CAD) data of the actual state channel geometry obtained by CAD and post-production micro-CT scanning of the design and presented in tables. This research shows that the production-induced sagging problem affects the flow by narrowing the channel hydraulic diameter in channel geometries produced without CCC supports.

在增材制造 (AM) 设计研究中无需支持的可制造性带来了许多优势，例如时间、成本、零件表面质量和设计自由度。人们认为，无需支持即可生产的几何形状将有助于更广泛地使用增材制造技术。在这项研究中，在直接金属激光烧结 (DMLS) 系统中进行了在圆柱形、宽椭圆形、水滴形、六边形、窄椭圆形和五边形横截面中创建的随形冷却通道 (CCC) 几何形状的无支撑可制造性和效率研究。该研究在显示不同通道几何形状在 CCC 应用中的可用性方面提供了创新。研究表明，在相对处理的几何形状中，五边形形状具有最有效的冷却能力。结果是通过计算流体动力学 (CFD) 分析研究获得的，对由 CAD 获得的实际状态通道几何的计算机辅助设计 (CAD) 数据和设计的后期制作微 CT 扫描进行了研究，并以表格的形式呈现。这项研究表明，生产引起的下垂问题会通过在没有 CCC 支撑的情况下生产的通道几何形状中缩小通道水力直径来影响流动。