【摘要】 某型发动机的实际涡轮盘腔冷却结构被简化成外缘预旋进气的旋转空腔模型，以实验方法研究了旋转雷诺数（Ｒｅω）、冷气雷诺数（Ｒｅｚ）、哥拉晓夫数（Ｇｒ＊）对主盘平均换热特性的影响。实验发现，旋转空腔内流态将由罗斯比数（Ｒｏ）判断。根据实验结果给出了计算主盘表面平均对流换热系数的经验关系式。更多还原

【Abstract】 A turbine cooling configuration of an aeroengine was simplified to a rotating cavity with a tangential preswirling fringe guide vane and a radial outlet.The influences of rotating Reynold number,cooling air Reynold number and Grashoff number on the averaged heat transfer characteristics were experimentally investigated.The experiment indicated that the flow pattern in the rotating cavity is mainly controlled by Rossby number.The averaged heat transfer coefficient on the main disk increases with the increase of cooling air Reynold number and Grashoff number,the increase of rotating Reynold number decreases the heat transfer coefficient at some regions of the Rossby number and causes it to increase at others.Two experimental correlations for different regions of Rossby number,are established for the averaged heat transfer coefficient on the main surface.更多还原