加力燃烧室湍流火焰面模型优化方法

李安琦; 刘勇; 张祥

doi:10.13224/j.cnki.jasp.20210303

加力燃烧室湍流火焰面模型优化方法

doi: 10.13224/j.cnki.jasp.20210303

南京航空航天大学能源与动力学院航空发动机热环境与热结构工业和信息化部重点实验室，南京 210016

基金项目: 航空发动机及燃气轮机重大专项基础研究项目（2017-Ⅲ-0007-0033）

详细信息

作者简介:
李安琦（1999-），女，硕士生，主要从事燃烧室燃烧方向的研究

中图分类号: V231.2
计量
- 文章访问数: 265
- HTML浏览量: 31
- PDF量: 394
- 被引次数: 0
出版历程
- 收稿日期: 2021-06-16
- 网络出版日期: 2023-04-03

Optimization method of turbulent flamelet model in afterburner

Aero-engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information Technology，College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China

摘要

摘要:
加力燃烧室中流速高、压力低、含氧量低，燃油喷射以直射式为主，常用燃烧模型多会高估其反应速率。火焰面类模型采用查表法处理标量场，计算速度较快，但较难调整反应速率。在稳态层流火焰面模型基础上，添加了非定常化学动力学的影响因素来调整反应速率；在试验数据基础上，建立火焰面反应时间尺度，优化火焰面数据库，改善了该类方法在高速、低压、贫氧和雾化差下的数值仿真精度。结果表明：该优化方法形成的火焰面数据库能够较好模拟加力燃烧室中燃油复杂化学反应过程；在本文计算结果验证中，能将温度分布模拟误差控制在15%以内，平均温度模拟误差控制在5%以内。
- 加力燃烧室 /
- 非定常化学动力学 /
- 湍流火焰面模型 /
- 火焰面数据库 /
- 雷诺时均数值模拟
Abstract:
In the afterburner with high flow rate high, low pressure, oxygen poverty, the direct fuel injection is predominent, and the combustion model usually overestimates the reaction rate of the afterburner. Table-searching method is used in flamelet models with the advantage of fast calculation, but it is difficult to adjust the reaction rate. Based on the steady laminar flamelet model, unsteady chemical kinetic factors were added to adjust the reaction rate. Based on the experimental data, the key geometric parameters were established. The flamelet database was optimized, and the numerical simulation accuracy of this method was improved under high speed, low pressure, oxygen poverty and poor atomization effect. The results showed that the flamelet database formed by this optimization method can better simulate the complex chemical reaction process in afterburner. According to the calculation results, the simulation error of temperature distribution can be controlled within 15%, and the simulation error of average temperature can be controlled within 5%.
- afterburner /
- unsteady chemical kinetics /
- turbulent flamelet model /
- flamelet database /
- reynolds averaged navier-stokes (RANS) simulation

HTML

图 1 不同反应时间下C₂H₄的质量分数分布

Figure 1. Distribution of mass fraction of C₂H₄ under different reaction time

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图 2 驻涡传焰槽稳定器试验模型结构图

Figure 2. Experimental model structure diagram of stationary vortex flame groove stabilizer

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图 3 驻涡传焰槽稳定器试验模型网格图

Figure 3. Grid diagram of experimental model of stationary vortex flame groove stabilizer

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图 4 温度/烟气采样耙布局示意图（单位:mm）

Figure 4. Schematic diagram of temperature/smoke sampling rake layout （unit:mm）

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图 5 驻涡传焰槽稳定器计算所得流场侧视、俯视图

Figure 5. Side view and top view of the flow field calculated by stationary vortex flame groove stabilizer

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图 6 不同τ取值数据库及稳态火焰面数据库计算所得俯视温度云图

Figure 6. Top view temperature nephogram calculated by different τ values databases and steady flame surface database

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图 7 不同截面温度沿X轴方向变化曲线

Figure 7. Temperature change curve of different sections along the X-axis direction

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图 8 不同数据库所得模拟结果与试验数据对比

Figure 8. Comparison of simulation results obtained from different databases with experimental data

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图 9 τ=0.163 ms数据库模拟结果与试验结果对比

Figure 9. Comparison of simulation results obtained from τ=0.163 ms database with experimental data

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图 10 不同工况下PM截面平均温度测量值与模拟值对比

Figure 10. Comparision of the measured average temperature and the simulation value of PM section under different working conditions

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表 1 试验工况表^[18]

Table 1. Experimental conditions^[18]

工况	空气进口速度/（m/s）	空气进口温度/K	试验段压力/MPa	总油气比
1	109.26	700	0.06	0.0378
2	103.96	700	0.04	0.0370
3	149.57	700	0.03	0.0372
4	135.04	600	0.03	0.0375
5	161.60	800	0.03	0.0365

下载: 导出CSV

表 2 工况1、工况2数值模拟值与试验测量值对比表^[18]

Table 2. Comparison table of numerical simulation value and experimental measurement value in working conditions 1 and 2^[18]

工况	高度/ mm	试验测量温度/K	数值模拟温度/K	温度偏差/ K	偏差百分比/%
1	18	1358.72	1483.35	124.63	9.17
	43	1325.14	1386.98	61.84	4.60
	68	1322.86	1177.28	145.58	11.0
2	18	1411.15	1570.09	158.94	11.26
	43	1431.10	1398.93	32.17	2.25
	68	1334.89	1161.81	173.08	12.97

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表 3 PM截面平均温度测量值与模拟值对比^[18]

Table 3. PM cross section average temperature measured and simulated values are compared^[18]

工况	PM截面平均测量温度/K	PM截面平均模拟温度/K	温度偏差/ K	偏差百分比/%
1	1335.57	1349.20	13.63	1.02
2	1392.38	1376.94	15.44	1.10
3	1517.25	1463.71	53.54	3.53
4	1473.20	1511.13	37.93	2.57
5	1608.18	1681.51	73.33	4.56

下载: 导出CSV

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