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波瓣结构后可变面积涵道引射器掺混特性

刘润富 黄玥 李臻曜 张慧骝 尤延铖

刘润富, 黄玥, 李臻曜, 等. 波瓣结构后可变面积涵道引射器掺混特性[J]. 航空动力学报, 2023, 39(X):20220594 doi: 10.13224/j.cnki.jasp.20220594
引用本文: 刘润富, 黄玥, 李臻曜, 等. 波瓣结构后可变面积涵道引射器掺混特性[J]. 航空动力学报, 2023, 39(X):20220594 doi: 10.13224/j.cnki.jasp.20220594
LIU Runfu, HUANG Yue, LI Zhenyao, et al. Numerical simulation of mixing characteristic of rear variable area bypass injector with lobed structure[J]. Journal of Aerospace Power, 2023, 39(X):20220594 doi: 10.13224/j.cnki.jasp.20220594
Citation: LIU Runfu, HUANG Yue, LI Zhenyao, et al. Numerical simulation of mixing characteristic of rear variable area bypass injector with lobed structure[J]. Journal of Aerospace Power, 2023, 39(X):20220594 doi: 10.13224/j.cnki.jasp.20220594

波瓣结构后可变面积涵道引射器掺混特性

doi: 10.13224/j.cnki.jasp.20220594
基金项目: 航空发动机及燃气轮机重大专项基础研究项目(J2019-Ⅲ-0016-0060)
详细信息
    作者简介:

    刘润富(1998-),男,硕士生,主要从事变循环发动机加力燃烧室冷热二股流掺混特性研究。E-mail:1909887537@qq.com

    通讯作者:

    黄玥(1983-),男,教授、博士生导师,博士,主要从事旋转爆震冲压发动机内外流一体化设计研究。E-mail:huangyue@xmu.edu.cn

  • 中图分类号: V231.2

Numerical simulation of mixing characteristic of rear variable area bypass injector with lobed structure

  • 摘要:

    为进一步提升变循环发动机后可变面积后涵道引射器(RVABI)内外涵道间气流的掺混效率,改善掺混气流间的速度均匀度,提出了一种带波瓣结构的可变面积涵道引射器外涵面积调节方法,并通过数值模拟手段与两种基本模型在总压损失、热混合效率、速度分布和漩涡演化等不同方面进行分析对比。结果表明:引入波瓣结构的可变面积涵道引射器外涵面积调节方法,显著改善了流场速度均匀度,极大的提升了内外涵气流混合的热混合效率。且随着涵道比增加,相比于基准构型带,波瓣结构的面积调节方法的流向涡强度逐渐增大,热混合效率提升的更加明显,掺混的程度取决于流向涡的尺度和影响范围,可以进一步优化波瓣和对应的面积调节机构进一步提升调节性能。

     

  • 图 1  RVABI几何尺寸示意图(单位:mm)

    Figure 1.  Schematic diagram of the RVABI (unit: mm)

    图 2  RVABI外涵调节方式及流场域示意图

    Figure 2.  Schematic of regulation mode and flow field of RVABI outer bypass

    图 3  波瓣结构的后可变面积引射器模型

    Figure 3.  Model of rear variable area bypass injector with lobed structure

    图 4  RVABI计算域网格

    Figure 4.  Computational mesh of the RVABI

    图 5  数值结果与试验结果对比

    Figure 5.  Comparison between numerical and experimental results

    图 6  不同面积调节方式的总压恢复系数变化图

    Figure 6.  Total pressure recovery coefficient with different RVABI structures

    图 7  不同面积调节方式的热混合效率变化图

    Figure 7.  Thermal mixing efficiency with different RVABI structures

    图 8  Z/D=0.5处流向涡、温度、速度矢量分布图

    Figure 8.  Contours of velocity vector,temperature and stream wise vorticity at Z/D=0.5 cross planes

    图 9  不同沿程截面的流向涡

    Figure 9.  Streamwise vorticity contours at various cross planes

    图 10  Z/D=2.25出口截面上沿着径向的速度系数分布

    Figure 10.  Velocity coefficient distribution along the radial direction on Z/D=2.25 cross planes

    图 11  速度系数沿流向方向变化图

    Figure 11.  Velocity coefficient changing along the flow direction

    图 12  涵道比对RVABI气动性能影响

    Figure 12.  Effect of culvert ratio on RVABI aerodynamic performance

    表  1  气体组分及其质量分数

    Table  1.   Mass fractions of the gas species

    气体组分内涵入口外涵入口
    N20.75010.7552
    O20.14680.2200
    CO20.07410.0099
    H2O0.02900.0049
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-08-16
  • 网络出版日期:  2023-12-14

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