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管-翅片复合式减涡器内旋涡破碎大涡模拟

张馨丹 王锁芳 沈文杰

张馨丹, 王锁芳, 沈文杰. 管-翅片复合式减涡器内旋涡破碎大涡模拟[J]. 航空动力学报, 2024, 39(X):20230122 doi: 10.13224/j.cnki.jasp.20230122
引用本文: 张馨丹, 王锁芳, 沈文杰. 管-翅片复合式减涡器内旋涡破碎大涡模拟[J]. 航空动力学报, 2024, 39(X):20230122 doi: 10.13224/j.cnki.jasp.20230122
ZHANG Xindan, WANG Suofang, SHEN Wenjie. Large eddy simulation of vortex broke down in tube-fin vortex reducer[J]. Journal of Aerospace Power, 2024, 39(X):20230122 doi: 10.13224/j.cnki.jasp.20230122
Citation: ZHANG Xindan, WANG Suofang, SHEN Wenjie. Large eddy simulation of vortex broke down in tube-fin vortex reducer[J]. Journal of Aerospace Power, 2024, 39(X):20230122 doi: 10.13224/j.cnki.jasp.20230122

管-翅片复合式减涡器内旋涡破碎大涡模拟

doi: 10.13224/j.cnki.jasp.20230122
基金项目: 国家科技重大专项(2017-Ⅲ-0011-0037)
详细信息
    作者简介:

    张馨丹(1998-),女,硕士生,研究领域为航空发动机流动与冷却。E-mail:xdzhang@nuaa.edu.cn

    通讯作者:

    王锁芳(1962-),教授,博士,研究领域为航空发动机流动与冷却。E-mail:sfwang@nuaa.edu.cn

  • 中图分类号: V231.1

Large eddy simulation of vortex broke down in tube-fin vortex reducer

  • 摘要:

    为深入理解管-翅片复合式减涡器的减阻特性,采用大涡模拟方法对比分析了基础管式及管-翅片复合式减涡器内的湍流脉动和旋涡尺度,通过相干结构和功率谱等揭示了减涡器内旋涡破碎的机制。结果表明:基础管式减涡器内减涡管通过破碎大尺度旋涡来降低压损,而在基础管式减涡器内加入翅片能够进一步破坏上游艾克曼边界层,抑制大尺度旋涡的发展,同时降低的旋流比有效削弱减涡管入口处小尺度旋涡的激增现象,使得减涡管区域熵增降低,进而实现更高程度的旋涡抑制效果,且该效果随着翅片下端安装高度的降低更为显著。在管-翅片复合式减涡器盘腔中,能量积分长度尺度随径向高度的降低先增加后减小;与基础管式减涡器相比,能量积分长度尺度的峰值向高半径方向移动,而在盘腔下游区域相对较低。

     

  • 图 1  共转盘腔结构及几何尺寸

    Figure 1.  Co-rotating cavity structures

    图 2  共转盘腔尺寸

    Figure 2.  Co-rotating cavity parameters

    图 3  TFVR-1模型网格

    Figure 3.  Numerical grid of TFVR-1

    图 4  CFD数值结果与实验结果对比

    Figure 4.  Comparison of CFD and experimental results

    图 5  盘腔内亚格子活性参数分布

    Figure 5.  Distribution of sub grid-activity parameter in the cavity

    图 6  流线与归一化熵分布

    Figure 6.  Distribution of streamlines and normalized entropy

    图 7  旋流比分布

    Figure 7.  Distribution of swirl ratio

    图 8  盘腔径向静压系数分布

    Figure 8.  Distribution of static pressure coefficient along radial direction

    图 9  相干结构分布

    Figure 9.  Distribution of coherent structure

    图 10  图.10 湍动能分布

    Figure 10.  Distribution of turbulent kinetic energy

    图 11  不同径向高度< vv′ >随轴向距离的变化

    Figure 11.  Variations of Reynolds stress with axial distance at different radial heights

    图 12  功率谱

    Figure 12.  Power spectrum

    图 13  能量积分长度尺度

    Figure 13.  Energy integral length scale

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  • 收稿日期:  2023-03-03
  • 网络出版日期:  2024-06-05

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