In order to reveal the effect of channel orientations on rotational heat transfer performance, this paper presents an experimental model of AR = 4:1 smooth rectangular channel. The stationary and rotational heat transfer characteristics of the channel are studied in the range of Re = 10,000–40,000 and Ro = 0–1.23 under the channel orientation of 90° and 135°, which represent the basic one and realistic one, respectively. The experimental results indicate that for the trailing wall, the 90° channel shows a typical large range enhancement of rotational heat transfer, while the rotational effect becomes negative in most areas at 135° case. As the rotation number exceeds 0.7, the heat transfer of the trailing surface is greatly improved by rotational effect in 90° channel. When the channel was orientated at 135°, the leading surface heat transfer is more sensitive to rotation under the low rotation number (Ro < 0.3), and 20%–30% worse than non-rotating cases. The averaged Nusselt ratios correlations under the channel orientation of 90° and 135° have been developed for further engineering applications.

为了揭示通道方向对旋转传热性能的影响，本文提出了AR  = 4:1光滑矩形通道的实验模型。在Re  = 10,000–40,000 和Ro范围内研究了通道的静止和旋转传热特性 = 0-1.23 在 90° 和 135° 的通道方向下，分别代表基本方向和现实方向。实验结果表明，对于后壁，90°通道表现出典型的大范围旋转传热增强，而在135°情况下，大部分区域的旋转效应变为负值。当转数超过0.7时，90°通道内的旋转效应大大改善了尾翼表面的传热。当通道定向为 135°时，在低旋转数（Ro  < 0.3）下，前表面传热对旋转更敏感，比非旋转情况差 20%–30%。为进一步的工程应用开发了 90° 和 135° 通道方向下的平均努塞尔比相关性。