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采用热敏液晶(TLC)瞬态传热实验技术对小流量下的中心进气转静系盘腔传热特性进行研究,介绍了同步触发拍摄系统,考察了流量与转速变化对动盘面传热的影响.结果表明:在所研究工况范围内,流量变化对动盘面中低半径处传热影响较大,对高半径处影响较小;转速升高使动盘面传热效果整体增强;当湍流流动参数较小时,动盘面中高半径区域努塞尔数随半径增大而增大;采用湍流流动参数对动盘面平均努塞尔数进行归纳,实验结果与雷诺相似分析结果的偏差小于15%,一定程度上验证了雷诺相似对转静盘腔传热问题的适用性.
The heat transfer characteristics of central inlet static and dynamic system under low flow were studied by using the thermal liquid crystal (TLC) transient heat transfer experiment technique. The synchronous trigger shooting system was introduced. The effects of flow rate and rotational speed on the heat transfer The results show that the change of flow has a great influence on the heat transfer at the low radius of the moving disk surface and the impact on the high radius at the working conditions studied. When the turbulent flow parameters are small, the Nusselt number in the high radius region of the moving disk surface increases with the increase of the radius. The average Nusselt number of the moving disk surface is summarized by the turbulent flow parameters. The deviation of the experimental results from that of the Renault similar analysis is less than 15% , To a certain extent, validates the applicability of Renault similar to the heat transfer problem of the static disk.