某型回流燃烧室壁温数值研究

张家祥; 蔡志斌; 翟维阔; 颜应文

doi:10.13224/j.cnki.jasp.20220812

某型回流燃烧室壁温数值研究

doi: 10.13224/j.cnki.jasp.20220812

张家祥^1,,
蔡志斌^{1, 2},
翟维阔²,
颜应文^1,*, ,

1.
南京航空航天大学能源与动力学院，南京 210016
2.
中国航发湖南动力机械研究所，湖南株洲 412002

基金项目: 国家科技重大专项（J2019-Ⅲ-0004-0047）

详细信息

作者简介:
张家祥（1998-），男，硕士生，主要从事航空发动机燃烧技术相关研究

通讯作者:
颜应文（1978-），男，教授、博士生导师，博士，主要从事航空发动机燃烧技术相关研究。E-mail：yanyw@nuaa.edu.cn

中图分类号: V231.1
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- 被引次数: 0
出版历程
- 收稿日期: 2022-10-24
- 网络出版日期: 2024-12-13

Numerical study on wall temperature of a reverse-flow combustor

ZHANG Jiaxiang^1
,,
CAI Zhibin^{1, 2},
ZHAI Weikuo²,
YAN Yingwen^{1,*
, ,}

1.
College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China
2.
Hunan Aviation Powerplant Research Institute，Aero Engine Corporation of China，Zhuzhou Hunan 412002，China

摘要

摘要:
为了探究某型回流燃烧室壁温分布，对该燃烧室进行流热固耦合数值计算,分析其冷态流场、燃烧特性和火焰筒壁温分布情况。壁温计算中考虑燃烧、热辐射和材料物理属性等因素对火焰筒壁温的影响规律，并与试验数据进行对比验证。数值计算结果表明：流热固耦合求解方法能够较准确地反映燃烧室的燃烧温度场和火焰筒壁温分布情况，火焰筒高温区域集中出现在主燃区，最高可达到1200 K以上；火焰筒主燃孔周围以及挡溅盘外缘处温度梯度较大，易出现烧蚀现象；随着油气比的增大，火焰筒掺混区壁温显著增加，接近主燃区壁温。
- 回流燃烧室 /
- 流热固耦合 /
- 壁面温度 /
- 数值计算 /
- 辐射换热
Abstract:
In order to investigate the wall temperature distribution of a certain type of reverse-flow combustor, the fluid-thermal-solid coupling numerical calculation of the combustor was carried out to analyze its cold field, combustion characteristics and flame tube wall temperature distribution. The influences of combustion, thermal radiation, material physical properties and other factors on the wall temperature of flame tube were considered in the calculation, and the results were compared with experimental data. The numerical results showed that the fluid-thermal-solid coupling solution method can accurately reflect the temperature field of combustor and the flame tube wall temperature distribution. The high temperature region of flame tube was concentrated in the primary combustion zone, with the maximum value reaching up to 1200 K or above. The temperature gradient around the primary holes of flame tube and the outer edge of spirt was relatively large, which was prone to ablation. With the increase of fuel-air ratio, the wall temperature of dilution zone in flame tube increased significantly, which was close to the wall temperature of primary zone.
- reverse-flow combustor /
- fluid-thermal-solid coupling /
- wall temperature /
- numerical calculation /
- radiation heat transfer

HTML

图 1 回流燃烧室示意图

Figure 1. Schematic diagram of the reverse-flow combustor

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图 2 计算域示意图

Figure 2. Schematic diagram of calculation domain

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图 3 中心截面速度场及流线图

Figure 3. Velocity streamline and flow fields on center section

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图 4 试验与数值计算的轴向速度对比

Figure 4. Comparison of axial velocity between numerical calculation and experiment

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图 5 CH*滤镜下的火焰图像

Figure 5. Flame image under CH* filter

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图 6 燃气温度为2300 K的等值面图

Figure 6. Iso-surface of gas temperature at 2300 K

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图 7 不同截面的温度分布图

Figure 7. Temperature distribution of different sections

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图 8 燃烧室出口温度分布图

Figure 8. Temperature distribution of combustor outlet

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图 9 燃烧室火焰筒壁温分布

Figure 9. Wall temperature distribution of combustor flame tube

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图 10 火焰筒壁温变化规律

Figure 10. Variation law of wall temperature of flame tube

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图 11 不同油气比工况下燃烧室温度分布

Figure 11. Temperature distribution of combustor under different fuel-air ratio

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图 12 气流孔上下游火焰筒最高壁温差值

Figure 12. Difference value of maximum wall temperature of flame tube in upstream and downstream of holes

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