Data underlying Chapter 7 of the PhD thesis: Directed Energy Deposition: an Additive Manufacturing Technology for Large High-Temperature Compact Heat Exchangers: Process characterization and fluid dynamic performance

Surface finishing is often required for heat exchangers built using Additive Manufacturing to meet the desired pressure drop specifications. Moreover, the highly textured as-built surfaces result in a measured pressure drop higher than what is predicted by current correlations. The study focused on evaluating the pressure drop and friction factor variations depending on the type of surface and its conditions, with channels fabricated using laser powder directed energy deposition. After testing, the samples were destructively sectioned to obtain geometric and detailed surface texture information. This dataset corresponds to the raw data for the pressure drop testing and surface measurements that support the dissertation for Paul Gradl (Chapter 7, Directed Energy Deposition: an Additive Manufacturing Technology for Large High-Temperature Compact Heat Exchangers: Process characterization and fluid dynamic performance.)

对于采用增材制造（Additive Manufacturing）制备的换热器而言，通常需要进行表面处理以满足既定的压降规格要求。此外，成形态下高度粗糙的表面会导致实测压降高于现有经验关联式的预测值。本研究针对采用激光粉末定向能量沉积（Laser Powder Directed Energy Deposition）制备的流道，评估了压降与摩擦因子随表面类型及表面状态的变化规律。测试完成后，对试样进行破坏性剖切以获取其几何参数与精细表面形貌信息。本数据集对应支撑Paul Gradl学位论文的压降测试与表面测量原始数据（该论文第7章：《定向能量沉积：面向大型高温紧凑型换热器的增材制造技术：工艺表征与流体动力学性能》）