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热辐射对气膜冷却叶片冷却性能影响

王天壹 宣益民

王天壹, 宣益民. 热辐射对气膜冷却叶片冷却性能影响[J]. 航空动力学报, 2018, 33(8): 1801-1810. doi: 10.13224/j.cnki.jasp.2018.08.002
引用本文: 王天壹, 宣益民. 热辐射对气膜冷却叶片冷却性能影响[J]. 航空动力学报, 2018, 33(8): 1801-1810. doi: 10.13224/j.cnki.jasp.2018.08.002
Effect of thermal radiation on the heat transfer performance of a film cooling vane[J]. Journal of Aerospace Power, 2018, 33(8): 1801-1810. doi: 10.13224/j.cnki.jasp.2018.08.002
Citation: Effect of thermal radiation on the heat transfer performance of a film cooling vane[J]. Journal of Aerospace Power, 2018, 33(8): 1801-1810. doi: 10.13224/j.cnki.jasp.2018.08.002

热辐射对气膜冷却叶片冷却性能影响

doi: 10.13224/j.cnki.jasp.2018.08.002

Effect of thermal radiation on the heat transfer performance of a film cooling vane

  • 摘要: 针对一种带有气膜冷却结构的涡轮一级导向叶片进行气-固-热耦合数值模拟,通过比较考虑/不考虑热辐射的温比和综合冷却效率,分析了多种辐射因素对叶片表面温度和冷却性能的影响。结果表明:入口黑体辐射温度在1200~1900K之间,叶片表面发射率在0.3~0.7之间时,考虑热辐射作用均会使叶片表面温度明显上升。入口黑体辐射温度1600K,叶片表面发射率为0.5时,叶片压力面温度整体上升约100K,叶片表面最高温度点(1350K)温度上升约50K;气体辐射对叶片吸力面和尾缘区域造成5%左右的温升;考虑辐射作用使得叶片综合冷却效率下降,叶片前缘和压力面尽管布置密集的气膜孔仍然难以满足冷却需求,综合冷却效率下降至0.3以下。

     

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出版历程
  • 收稿日期:  2017-03-05
  • 刊出日期:  2018-08-28

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