后可变面积涵道引射器动态流动调节特性研究

冯子懿; 李臻曜; 朱来钰; 黄玥; 张慧骝; 尤延铖

doi:10.13224/j.cnki.jasp.20240387

后可变面积涵道引射器动态流动调节特性研究

doi: 10.13224/j.cnki.jasp.20240387

厦门大学航空航天学院，福建厦门 361005

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）；国家自然科学青年基金（12302369）

详细信息

作者简介:
冯子懿（2001-），男，博士生，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

通讯作者:
黄玥（1983-），男，教授、博士生导师，博士，主要从事航空发动机先进气动与燃烧技术研究。E-mail：huangyue@xmu.edu.cn

中图分类号: V231.2
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出版历程
- 收稿日期: 2024-06-14
- 网络出版日期: 2025-10-23

Characterization of dynamic flow regulation of rear variable area bypass injector

School of Aerospace Engineering，Xiamen University，Xiamen Fujian 361005，China

摘要

摘要:
通过非定常数值仿真对后可变面积涵道引射器（RVABI）动态面积调节过程的流场特性进行了研究。首先发现面积调节器往复运动过程中外涵质量流量与面积调节器开度线性相关，而内涵质量流量进一步受面积调节器开度变化速度的影响，在单周期内呈现出滞回变化特性，最终导致涵道比的非线性滞回变化。同时分析了定频率和变频率运动对特征指标的影响规律，发现非对称运动方式的频率变化是加力燃烧室流动特征指标变化的主要因素。进一步地，对涵道比变化进行了非线性动力学建模以快速预测不同运动方式下的涵道比变化，模型预测结果与数值仿真结果最大涵道比的平均误差为4.1%。
- 后可变面积涵道引射器 /
- 自适应变循环发动机 /
- 加力燃烧室 /
- 动力学模型 /
- 动态仿真
Abstract:
The flow field characteristics during dynamic regulating process of the rear variable area bypass injector (RVABI) were carefully investigated by means of non-constant numerical simulation. In this study, it was found that the bypass stream flow was linearly correlated with the opening of the area regulator during the reciprocating motion of the area regulator, while the change of the main stream flow was further affected by the change rate of the opening of the area regulator, showing hysteresis change characteristics in a single period, and finally the characteristics of the bypass ratio nonlinear hysteresis change were formed. Then, the influence laws of the constant frequency motion mode and the variable frequency motion mode on the characteristic indexes were analyzed, finding that the frequency change of asymmetric motion mode was the main factor contributing to the changes of the flow characteristic indexes of afterburner. Furthermore, in order to quickly predict the change of bypass ratio under different motion modes, nonlinear dynamics modeling of bypass ratio change was carried out, and the average error of the maximum bypass ratio between the model prediction results and the numerical simulation results under different motion modes was 4.1%.
- rear variable area bypass injector /
- adaptive cycle engine /
- afterburner /
- dynamic modeling /
- dynamic simulation

HTML

图 1 计算加力燃烧室模型及尺寸（单位：mm）

Figure 1. Simulation afterburner model with size （unit：mm）

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图 2 不同运动方式的速度

Figure 2. Speed of different motion modes

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图 3 无关性验证

Figure 3. Irrelevance verification

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图 4 后台阶流动的实验与数值模拟对比

Figure 4. Comparison of experimental and numerical simulation for a backward-facing step flow

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图 5 f = 0.50 Hz的涵道比随面积比变化

Figure 5. Bypass ratio versus area ratio for the case of f = 0.50 Hz

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图 6 f = 0.50 Hz的流场分布与稳态流场

Figure 6. Flow field distribution for the case of f = 0.50 Hz and steady flow

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图 7 f = 0.50 Hz的质量流量变化

Figure 7. Variation of mass flow rate for the case of f = 0.50 Hz

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图 8 f = 0.50 Hz随时间变化的流向速度分布

Figure 8. Streamwise velocity distributions with time for the case of f = 0.50 Hz

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图 9 f = 0.50 Hz的流场速度分布

Figure 9. Velocity distribution in the flow field for the case of f = 0.50 Hz

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图 10 对称运动方式涵道比随面积比的变化

Figure 10. Bypass ratio versus area ratio for the case of symmetric motion mode

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图 11 非对称运动方式涵道比随面积比的变化

Figure 11. Bypass ratio versus area ratio for the case of asymmetric motion mode

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图 12 非对称运动方式质量流量变化

Figure 12. Variation of mass flow rate for the case of asymmetric motion mode

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图 13 不同运动方式的总压恢复系数

Figure 13. Total pressure recovery coefficient for different motion modes

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图 14 不同运动方式的面积调节器所受阻力

Figure 14. Resistance to the area regulator for different motion modes

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图 15 f = 1.00 Hz的动力学模型与数值模拟结果对比

Figure 15. Comparison of numerical simulation results and scaling law for the cases of f = 1.00 Hz

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图 16 f = 0.33 Hz的动力学模型与数值模拟结果对比

Figure 16. Comparison of numerical simulation results and scaling law for the cases of f = 0.33 Hz

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图 17 非对称运动方式的动力学模型与数值模拟结果对比

Figure 17. Comparison of numerical simulation results and scaling law for the cases of asymmetric motion mode

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表 1 不同运动方式的频率

Table 1. Frequency of different motion modes Hz

运动方式	f_upstroke	f_downstroke
f = 1.00 Hz	1.00	1.00
f = 0.75 Hz	0.75	0.75
f = 0.50 Hz	0.50	0.50
f = 0.375 Hz	0.375	0.375
f = 0.33 Hz	0.33	0.33
先快后慢	0.75	0.375
先慢后快	0.375	0.75

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表 2 不同运动方式的平均涵道比、平均总压恢复系数和平均阻力

Table 2. Mean bypass ratio, mean total pressure recovery coefficient and mean resistance for different motion modes

运动方式	B_ave	σ_ave	F_ave
f = 1.00 Hz	0.2169	0.982	355.41
f = 0.75 Hz	0.2224	0.982	314.44
f = 0.50 Hz	0.2135	0.982	316.89
f = 0.375 Hz	0.2191	0.982	349.77
f = 0.33 Hz	0.2169	0.983	342.97
先快后慢	0.2213	0.982	383.82
先慢后快	0.2148	0.982	319.14

下载: 导出CSV

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