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采用数值模拟的方法,研究了旋转受限层板结构中隔板对层板中冷却气体流动换热的影响机理.结果表明:隔板结构能够有效地提高层板的换热能力,旋转受限层板比不受限横流冲击层板的Nu高18%,比不受限横流冲击出流层板的Nu高15%.隔板导热条件下比绝热条件下的层板的Nu提高10%~15%.在旋转受限层板中,冲击孔靠近旋转中心一侧换热能力随着旋转数的增加而降低,冲击孔远离旋转中心一侧换热能力随着旋转数的增加而增加.旋转的加入,可以有效地降低靶面上由于隔板的加入而导致的高温区的温度,旋转受限层板更适用于涡轮动叶.
The influence mechanism of the baffle on the flow and heat transfer of the cooling gas in the laminates was investigated by means of numerical simulation.The results show that the baffle structure can effectively improve the heat transfer capacity of the laminates, The laminates were 18% more Nu than unconfined cross-flow impact laminates and 15% more Nu than the unconfined cross-flow impact laminar laminates.Under the separator thermal conductivity was increased by 10% 15%. In the rotating constrained laminate, the heat exchange capacity of the impact hole near the center of rotation decreases with the increase of the number of revolutions, and the heat transfer capacity of the impact hole away from the center of rotation increases with the number of revolutions. Can effectively reduce the temperature of the high temperature zone caused by the addition of the separator on the target surface, and the rotation limited layer plate is more suitable for the turbine rotor blade.