Scientific Reports ( IF 3.8 ) Pub Date : 2023-09-21 , DOI: 10.1038/s41598-023-42568-2 Mateusz Korpyś 1 , Marzena Iwaniszyn 1 , Katarzyna Sindera 1 , Mikołaj Suwak 1 , Anna Gancarczyk 1 , Andrzej Kołodziej 1, 2
Monolithic structures of catalytic reactors offer low flow resistance, but their drawback is weak heat and mass transport. For transport intensification, innovative streamlined structures were designed, the walls of which are shaped like an airplane wing. Extensive CFD (Computer Fluid Dynamics) studies were performed for the streamlined and—for comparison—classic (sharp-edged) structures, covered flow phenomena, and heat transfer to channel walls. The streamlined structures were made using the SLM (Selective Laser Melting) method to perform heat transfer experiments that gave a satisfactory agreement with the CFD. Heat transfer for streamlined structures was, by CFD, more intensive than for the classical ones. CFD simulations showed a significant reduction of vortices in streamlined structures. The lack of an inlet vortex was demonstrated, for classic structures strongly limiting transfer properties. For the streamlined structures the outlet vortex even intensifies heat transport near the outlet of the channel. The CFD showed the flow patterns for the structures as well as the distribution of transport coefficients within the millimetre-sized channels.
中文翻译:
流线型和锋利边缘的短整体结构层流中的流动现象
催化反应器的整体结构具有低流动阻力,但其缺点是传热和传质较弱。为了加强运输,设计了创新的流线型结构,其墙壁形状像飞机机翼。对流线型结构和经典(锐边)结构、覆盖流动现象以及通道壁的传热进行了广泛的 CFD(计算机流体动力学)研究。使用SLM(选择性激光熔化)方法制作流线型结构并进行传热实验,结果与CFD 吻合良好。根据 CFD 计算,流线型结构的传热比经典结构的传热更加强烈。CFD 模拟显示流线型结构中的涡流显着减少。证明了缺乏入口涡流,因为经典结构强烈限制了传递特性。对于流线型结构,出口涡流甚至增强了通道出口附近的热传递。CFD 显示了结构的流动模式以及毫米级通道内传输系数的分布。