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在主流入口雷诺数为15 000,最大流量比(侧向射流流量和主流流量的比值)与最大旋转数分别为0.4和0.23的范围内,实验研究了三个不同位置引入侧向冷气射流冲击对楔形通道内换热分布的影响。实验结果表明:静止状态下,侧向射流冲击只能强化侧向射流孔附近区域的换热;旋转状态下,侧向射流对主流上游的影响区域扩大,并减缓了射流区域的冷气侧向出流,缩小了射流区域内前、后缘面的换热差异,当射流区域的换热效率最高时,该差异最小。为提升通道的平均换热效率,降低旋转对换热的不利影响,侧向射流孔应在通道的中上部,流量比控制在对应的临界值以下。
In the mainstream inlet Reynolds number of 15 000, the maximum flow ratio (lateral jet flow and mainstream flow ratio) and the maximum number of revolutions were 0.4 and 0.23, the experimental study of the introduction of three different positions of the lateral air-jet impact Effect of heat transfer distribution in wedge channels. Experimental results show that lateral jet impingement can only enhance the heat transfer in the vicinity of the lateral jet hole under quiescent conditions. In the rotating state, the influence of the lateral jet on the upper stream of the main stream is broadened and the lateral flow of the cooling air is slowed down The difference in heat exchange between the front and the trailing edge surfaces in the jet area is reduced. This difference is minimal when the heat exchange efficiency in the jet area is the highest. In order to enhance the average heat transfer efficiency of the channel and reduce the adverse effect of rotation on heat transfer, the lateral jet holes should be in the middle and upper part of the channel and the flow ratio should be controlled below the corresponding critical value.