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提高回转通道气体压力,将实验雷诺数和旋转数范围分别扩展到10 000~70 000和0~2.08,在此基础上实验研究了高旋转数下通道转角为0°,22.5°,45°的带45°倾角斜肋的方形截面回转通道的换热特性.结果表明:在第1通道,通道转角对后缘面换热的影响整体上强于前缘面,尤其是通道入口段位置;在第2通道,通道转角对换热的影响比较小.对于区域平均换热分布,通道转角为45°的通道平均换热最强,通道转角为22.5°的通道次之,通道转角为0°的通道平均换热在3个通道转角中最弱.
The pressure of the gas in the swivel channel was increased, and the experimental Reynolds number and the number of rotations were extended to 10 000 ~ 70 000 and 0 ~ 2.08, respectively. Based on this, the experimental results showed that the rotational angles of the swirl channels were 0 °, 22.5 ° and 45 ° The results show that the influence of channel angle on the trailing edge surface heat transfer is better than that of the leading edge surface especially on the entrance of the channel in the first channel. The influence of channel angle on heat transfer is relatively small for channel 2. For the average heat transfer distribution in the area, the average heat transfer of the channel with the channel angle of 45 ° is the strongest, the channel with the channel angle of 22.5 ° followed by the channel with the channel angle of 0 ° The average heat transfer in the channel is the weakest of the three channels.