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新型台阶缝冷却结构的气动及冷却特性

吴宏 杨登文

吴宏, 杨登文. 新型台阶缝冷却结构的气动及冷却特性[J]. 北京航空航天大学学报, 2018, 44(2): 264-272. doi: 10.13700/j.bh.1001-5965.2017.0384
引用本文: 吴宏, 杨登文. 新型台阶缝冷却结构的气动及冷却特性[J]. 北京航空航天大学学报, 2018, 44(2): 264-272. doi: 10.13700/j.bh.1001-5965.2017.0384
WU Hong, YANG Dengwen. Aerodynamic and cooling performance of a novel step-shaped slot film cooling geometry[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(2): 264-272. doi: 10.13700/j.bh.1001-5965.2017.0384(in Chinese)
Citation: WU Hong, YANG Dengwen. Aerodynamic and cooling performance of a novel step-shaped slot film cooling geometry[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(2): 264-272. doi: 10.13700/j.bh.1001-5965.2017.0384(in Chinese)

新型台阶缝冷却结构的气动及冷却特性

doi: 10.13700/j.bh.1001-5965.2017.0384
详细信息
    作者简介:

    吴宏  男, 博士, 教授。主要研究方向:航空发动机高温部件冷却技术

    杨登文  男, 博士研究生。主要研究方向:航空发动机高温部件冷却技术

    通讯作者:

    吴宏, E-mail:wuhong@buaa.edu.cn

  • 中图分类号: V231.1

Aerodynamic and cooling performance of a novel step-shaped slot film cooling geometry

More Information
  • 摘要:

    为了抑制气膜冷却过程中耦合涡的产生,提出了一种切向出流台阶缝冷却结构,并对其在涡轮导叶吸力面、压力面上布置时的气动性能及冷却特性进行了数值研究。结果表明:在吸力面叶栅通道喉部附近布置时仅使总压损失增加约2%;在压力面布置则能使总压损失、能量损失在低吹风比工况各降低约2.5%,同时出口气流角的增加不到0.1%,而且损失系数和出口气流角对吹风比的变化也不敏感。吸力面、压力面缝后冷却效率均较高,在高吹风比工况平均都有约8%轴向弦长的叶片表面冷却效率接近1.0。

     

  • 图 1  新型台阶缝冷却结构示意图

    Figure 1.  Schematic of proposed step-shaped slot film cooling configuration

    图 2  计算模型

    Figure 2.  Computational model

    图 3  台阶缝位置分布示意图

    Figure 3.  Schematic of distribution locations of step-shaped slot on the vane

    图 4  计算网格示意图

    Figure 4.  Schematic of computational mesh

    图 5  数值计算方法验证

    Figure 5.  Verification of numerical calculation methods

    图 6  台阶缝缝口局部流场示意图

    Figure 6.  Schematic of local flow field around step-shaped slot film cooling configuration

    图 7  台阶缝对叶片表面压力系数的影响

    Figure 7.  Effect of coolant injection from step-shaped slot on blade pressure coefficient

    图 8  台阶缝缝口附近叶片表面压力系数

    Figure 8.  Blade pressure coefficient around step-shaped slot film cooling configuration

    图 9  叶片表面布置台阶缝对叶栅气动性能的影响

    Figure 9.  Effect of coolant injection from step-shaped slot on vane surface on cascade aerodynamic performance

    图 10  叶片吸力面布置台阶缝时,叶高中部叶片表面上冷却效率随吹风比的变化

    Figure 10.  Variation of mid-span film cooling effectiveness of suction-side step-shaped slot with blowing ratio

    图 11  叶片压力面布置台阶缝时,叶高中部叶片表面上冷却效率随吹风比的变化

    Figure 11.  Variation of mid-span film cooling effectiveness of pressure-side step-shaped slot with blowing ratio

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出版历程
  • 收稿日期:  2017-06-06
  • 录用日期:  2017-09-22
  • 刊出日期:  2018-02-20

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