多次弯曲冷却通道是燃机高温叶片的一种典型冷却结构。Metzger等人针对叶片冷却问题曾对转角为180°矩形弯曲流道的压力损失进行了研究,但其换热特性目前还没有公开发表的研究资料。本文用实验方法研究了不同高宽比、不同曲率半径比和顶端有排气孔的多次弯曲180°矩形流道内的流动特性与换热规律。 Multiple curved cooling passages are a typical cooling structure for high temperature blades of gas turbines. Metzger et al. Studied the pressure loss of a rectangular bent channel with a 180 ° corner for the problem of blade cooling. However, there is no published research data on the heat transfer characteristics. In this paper, the flow characteristics and heat transfer laws of multiple 180 ° rectangular channels with different aspect ratios, different radii of curvature radii, and vents at the top have been studied experimentally.