凹腔驻涡与径向组合稳定器的流动与燃烧特性

康玉东; 钟世林; 彭维康; 翟云超; 邓远灏

doi:10.13224/j.cnki.jasp.20230128

凹腔驻涡与径向组合稳定器的流动与燃烧特性

doi: 10.13224/j.cnki.jasp.20230128

康玉东¹,
钟世林^{1, 2,*, ,},
彭维康¹,
翟云超¹,
邓远灏¹

1.
中国航发四川燃气涡轮研究院，成都 610500
2.
清华大学航空发动机研究院，北京 100084

详细信息

作者简介:
康玉东（1985-），男，研究员，博士，主要从事加力燃烧室研究

通讯作者:
钟世林（1975-），男，研究员，博士生，主要从事加力燃烧室研究。E-mail：zhongslcgte@sohu.com

中图分类号: V231.2
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出版历程
- 收稿日期: 2023-03-04
- 网络出版日期: 2024-08-21

Flow and combustion characteristics of trapped vortex cavity combined with radial flameholder

1.
Sichuan Gas Turbine Establishment，Aero Engine Corporation of China，Chengdu 610500，China
2.
Institute for Aero Engine，Tsinghua University，Beijing 100084，China

摘要

摘要:
为了提升凹腔驻涡加力燃烧室的综合燃烧性能，获取径向稳定器倾角对组合稳定器系统流动及燃烧特性的影响规律，设计了安装倾角为5°、8°、10°、15°的凹腔驻涡加力燃烧室，采用数值模拟与试验验证相结合的方法，进行了不同余气系数下的综合燃烧性能研究。研究工况外涵温度为600 K、内涵温度为1000 K、内涵压力为180 kPa、涵道比为0.17、余气系数为1.27～2。获得了加力燃烧室流场、出口燃气温度、总压恢复系数、凹腔壁温、径向稳定器壁温变化规律。结果表明：与径向稳定器10°倾角相比，5°倾角下总压恢复系数低0.002～0.006、出口燃气温度高20～40 K、凹腔驻涡稳定器最高壁温低63～82 K、径向稳定器壁温高60～70 K。
- 径向稳定器倾角 /
- 凹腔驻涡稳定器 /
- 加力燃烧室 /
- 流动特性 /
- 燃烧特性
Abstract:
In order to improve the comprehensive combustion performance of trapped vortex cavity afterburner and better understand the effect of radial flameholder installation angle on flow and combustion characteristics, numerical and experimental investigation were employed at 5°, 8°, 10°, 15° under different excess air coefficients. The investigations were performed under the bypass temperature 600 K, the core temperature 1000 K, the core pressure 180 kPa, the bypass ration 0.17, and excess air coefficient 1.27—2. Through investigation, the flow filed, exit temperature, total pressure recovery coefficient, wall temperature of trapped vortex cavity (TVC) and radial flameholder were obtained. The results showed that when the angle was 5°, the total pressure recovery coefficient was 0.002—0.006 lower, the exit temperature was 20—40 K higher, the TVC wall temperature was 63—82 K lower, the radial flameholder wall temperature was 60—70 K higher than that at the angle of 10°.
- radial flameholder angle /
- trapped vortex cavity flameholder /
- afterburner /
- flow characteristics /
- combustion characteristics

HTML

图 1 加力燃烧室试验件

Figure 1. Structure of trapped vortex cavity afterburner

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图 2 试验系统

Figure 2. Test system

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图 3 出口总温、总压耙布局

Figure 3. Distribution of total temperature/pressure rake

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图 4 凹腔壁温测点分布

Figure 4. TVC thermocouples position

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图 5 径向稳定器壁温测点分布

Figure 5. Radial flameholder thermocouples position

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图 6 计算区域及网格

Figure 6. Computational domain and grid

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图 7 不同网格数量下出口平均总温

Figure 7. Average total temperature of exit with different grid numbers

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图 8 出口平均总温模拟计算和试验结果对比

Figure 8. Comparison of average total temperature of exit between numerical simulation results and test results

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图 9 不同倾角下截面Ⅰ静压分布（单位：kPa）

Figure 9. Static pressure contour of section Ⅰ with different angles （unit：kPa）

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图 10 不同倾角下截面Ⅰ温度分布（单位：K）

Figure 10. Temperature contour of section Ⅰ with different angles （unit：K）

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图 11 5°和10°倾角下出口燃气总温

Figure 11. Exit gas total temperature for angles of 5° and 10°

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图 12 5°和10°倾角下总压恢复系数

Figure 12. Total pressure recovery coefficient for angles of 5° and 10°

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图 13 5°和10°倾角下凹腔壁温

Figure 13. TVC temperature for angles of 5° and 10°

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图 14 5°和10°倾角下径向稳定器壁温

Figure 14. Radial flameholder temperature for angles of 5° and 10°

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表 1 工作条件

Table 1. Operating conditions

参数数值

p_t6av/kPa 180

T_t6av/K 1000

T_t16/K 600

B 0.17

Ma 0.28

α 1.27, 1.45, 1.75, 2

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表 2 凹腔驻涡稳定器内混气停留时间计算结果

Table 2. Computational results of mixture residence time in TVC

倾角/（°） W_a/（kg/s） Q/（m³/s） τ_tvc/ms

5 0.070 0.32 2.46

8 0.067 0.29 2.69

10 0.064 0.27 2.91

15 0.058 0.22 3.51

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