一、前言 180°连续折转且沿流动方向具有不同截面几何的流道是高温透平叶片中腔典型的冷却结构,在高效换热器及其它高温部件冷却中均有类似的设计。目前,这种复杂流道传热和流动阻力的研究还为数不多,尤其扰流柱在弯曲、变截面流道中强化传热的研究更为少见。本文对扰流柱在180°连续折转、气流依次流经扩展流道、梯形截面 I. INTRODUCTION Flow channels with 180 ° continuous turns and different cross-sectional geometries along the flow direction are typical cooling chambers in high-temperature turbine vanes. Similar designs exist for cooling high-efficiency heat exchangers and other high-temperature components. At present, the research on the heat transfer and flow resistance of this complex flow channel is still scarce, especially the research on the enhanced heat transfer of the spoiler in the curved and variable cross-section flow channels is even rarer. In this paper, the spoiler is folded continuously at 180 °, and the airflow flows through the extended runner and the trapezoidal section in sequence