徐建宇1, 周莉1,2(
), 王占学1,2, 是介1, 史毫1
更多阅读
收稿日期:2024-06-03
修回日期:2024-06-27
接受日期:2024-08-12
出版日期:2024-08-26
发布日期:2024-08-20
通讯作者:
周莉
E-mail:zhouli@nwpu.edu.cn
基金资助:
Jianyu XU1, Li ZHOU1,2(
), Zhanxue WANG1,2, Jie SHI1, Hao SHI1
更多阅读
Received:2024-06-03
Revised:2024-06-27
Accepted:2024-08-12
Online:2024-08-26
Published:2024-08-20
Contact:
Li ZHOU
E-mail:zhouli@nwpu.edu.cn
Supported by:摘要:
为对临近空间高超声速飞行器羽流的红外辐射特性进行研究,构建了适用于临近空间羽流流场的红外辐射特性计算方法。 更多阅读首先采用非线性耦合本构关系模型对羽流流场进行数值仿真,检验了流场计算模型的准确性。其次采用全因子试验设计,通过逐线计算物理模型获取了46 200组流场特性参数与吸收系数的数据,训练获得基于BP神经网络的快速逐线计算模型,模型最大平均绝对误差和决定系数分别为0.003 65和0.999 4,相比逐线计算物理模型计算速度提升了4个数量级。最后结合逆蒙特卡洛方法作为红外辐射传输方法,建立了高超声速飞行器羽流的红外辐射计算方法。采用建立的流场和红外辐射计算方法针对类X-51A飞行器巡航状态下羽流红外辐射特性进行了研究。研究表明,临近空间下高超声速羽流呈现出外热流包裹冷内流的现象,羽流边缘滞止区红外辐射更强,红外成像中呈现“剪刀”状,剪切层的变化影响羽流红外成像的特征。
中图分类号:
徐建宇, 周莉, 王占学, 是介, 史毫. 基于快速逐线计算模型的高超声速羽流红外辐射计算方法[J]. 航空学报, 2025, 46(8): 630778.
Jianyu XU, Li ZHOU, Zhanxue WANG, Jie SHI, Hao SHI. Calculation method for hypersonic plume infrared radiation based on a fast line-by-line calculation model[J]. Acta Aeronautica et Astronautica Sinica, 2025, 46(8): 630778.
表4
羽流化学反应动力式
| 化学反应 | 正向反应速率 | 反向反应速率 |
|---|---|---|
| 3.0×10-34exp(900/T) | 4.23×10-9exp(-58 950/T) | |
| 1.0×10-29T-1 | 1.14×10-5T-1exp(-51 610/T) | |
| 1.0×10-25T-2 | 1.12T-2exp(-60 180/T) | |
| 2.4×10-10exp(-8 250/T) | 1.94×10-11T-1exp(-280/T) | |
| 1.0×10-11exp(-550/T) | 9.80×10-11exp(-9 120/T) | |
| 7.0×10-33exp(-2 200/T) | 8.24×10-7T1.3exp(-64 670/T) | |
| 2.8×10-17exp(330/T) | 2.92×10-15T1.3exp(-10 550/T) |
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