| 张少丽，周吉利，徐兴平，王 旭，潘鑫峰.轴对称收扩喷管温度场数值仿真[J].航空发动机,2023,49(4):122-127 |
| 轴对称收扩喷管温度场数值仿真 |
| Numerical Simulation on the Temperature Field of Axisymmetric Convergent Divergent Nozzle |
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| DOI： |
| 中文关键词: 温度场 轴对称收扩喷管 加力燃烧室 壁面温度 数值仿真 航空发动机 |
| 英文关键词:temperature field axisymmetric convergent divergent nozzle afterburner wall temperature numerical simulation aeroengine |
| 基金项目:航空动力基础研究项目资助 |
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| 中文摘要: |
| 为了提高轴对称喷管壁温仿真精度及获得影响壁温的主要因素，通过加力燃烧室和轴对称收扩喷管联合仿真，并将
CFD数值模拟结果和试验状态喷管壁面温度进行对比分析，研究了边界条件对喷管壁温的影响。基于加力喷管联合仿真提取喷
管入口参数的方法研究了收敛段隔热屏结构形式、收敛段冷却通道高度和冷却气流量对轴对称收扩喷管壁面温度的影响。结果
表明：采用加力和喷管联合仿真计算时喷管调节片链温度与试验结果规律一致，差值较小约50 ℃；随隔热屏加长调节片温度降
低，密封片温度升高；后端半圆形缺口的隔热屏使得扩张段温度呈V型分布，调节片温度升高，密封片温度降低；全环隔热屏对调
节片和密封片均有较好的冷却效果；随冷却通道高度减小2 mm，调节片温度升高50 ℃，密封片温度降低；随冷却气流量增加1 kg/s
喷管最高壁温降低200 ℃。 |
| 英文摘要: |
| In order to improve the simulation accuracy of axisymmetric nozzle wall temperature and obtain their main affecting factors,
the influence of boundary conditions on wall temperature was studied by using a joint simulation of the afterburner and the axisymmetric
convergent-divergent nozzle and comparing the CFD results with the experimental data. The nozzle inlet parameters extracted from the af-
terburner-nozzle joint simulation were used to study the effects of the shape of the convergent section cooling liner, the height of the conver-
gent section cooling channel, and the cooling gas flow on the wall temperature of the axisymmetric convergent divergent nozzle. The results
indicated that when the joint simulation method is used, the temperature of the nozzle convergent flaps is consistent with the test results,
with a relatively small difference, about 50 ℃. With the extension of the heat shield, the temperature of the convergent flaps decreases, and
the temperature of the sealing plate increases. With the use of the heat shield with a semicircular notch at the rear end, the temperature dis-
tribution of the divergent section exhibits a V-shaped feature, the temperature of the adjusting plate increases, and the temperature of the
sealing plate decreases. The full annular heat shield has a good cooling effect on the adjusting plate and sealing plate. With a 2mm decrease
in the cooling channel height, the temperature of the adjusting plate increases 50 ℃ and the temperature of the sealing plate decreases.
With a 1kg/s increase in the cooling gas flow, the temperature of the nozzle wall decreases by 200 ℃. |
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