基于共轭传热的单边膨胀后体温度场计算分析

李虹杨; 王霄; 孙超

doi:10.13224/j.cnki.jasp.20210346

基于共轭传热的单边膨胀后体温度场计算分析

doi: 10.13224/j.cnki.jasp.20210346

中国航空工业集团有限公司沈阳飞机设计研究所，沈阳 110035

详细信息

作者简介:
李虹杨（1989-），男，高级工程师，博士，主要从事飞行器气动布局设计，进排气系统设计等方面的研究。

中图分类号: V211.3
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出版历程
- 收稿日期: 2021-07-04
- 网络出版日期: 2022-09-06
- 刊出日期: 2022-08-28

Calculation and analysis of temperature distribution of single expansion after⁃body based on conjugate heat transfer

Shenyang Aircraft Design and Research Institute，Aviation Industry Corporation of China，Limited，Shenyang 110035，China

摘要

摘要: 基于共轭传热数值计算方法，对某高隐身无人机（UAV）单边膨胀后体喷流作用下的壁面温度分布进行研究，利用薄壁型网格解决了面积大且厚度薄的蒙皮、侧板结构导致的网格量过大的问题，构建精度较高的计算模型，并完成相关计算分析，主要结论如下：传统的单一流体计算虽然可以得到相似的温度分布，但得到的温度值偏高，最大可相差50 K以上；共轭传热计算可以得到更为符合实际的结果，并且可以得到结构内部温度梯度的分布，为热应力分析及结构设计提供指导；对比相同流动条件下不同金属材料的影响，某耐高温合金的壁面温度极值比金属钢高约30 K，且其上、下壁面的温差更大，梯度更高，两材料纵向肋板位置温度梯度极值分别为120 K/cm和65 K/cm。

基于共轭传热数值计算方法，对某高隐身无人机（UAV）单边膨胀后体喷流作用下的壁面温度分布进行研究，利用薄壁型网格解决了面积大且厚度薄的蒙皮、侧板结构导致的网格量过大的问题，构建精度较高的计算模型，并完成相关计算分析，主要结论如下：传统的单一流体计算虽然可以得到相似的温度分布，但得到的温度值偏高，最大可相差50 K以上；共轭传热计算可以得到更为符合实际的结果，并且可以得到结构内部温度梯度的分布，为热应力分析及结构设计提供指导；对比相同流动条件下不同金属材料的影响，某耐高温合金的壁面温度极值比金属钢高约30 K，且其上、下壁面的温差更大，梯度更高，两材料纵向肋板位置温度梯度极值分别为120 K/cm和65 K/cm。Based on the conjugate heat transfer numerical simulation method，the wall temperature distribution of single expansion after⁃body of a high stealth unmanned aerial vehicle （UAV） was studied.The problem of excessive mesh caused by large area and thin thickness of skin and side plate structure was solved by using thin⁃walled layer mesh.A high⁃precision calculation model was constructed，and the relevant calculation and analysis was completed.The main conclusions were made as follows：although the traditional single fluid calculation can obtain similar temperature distribution，the temperature value was much higher，and the maximum difference can be more than 50 K；the results of conjugate heat transfer calculation were more practical，and could furthermore obtain the temperature gradient distribution in the structure，providing a guidance for thermal stress analysis and structural design；comparing the effects of different metal materials under the same flow conditions，the wall temperature extreme value of a high temperature resistant alloy was about 30 K higher than that of metal steel，and the temperature difference between the upper and lower walls was larger and the gradient was higher.The temperature gradient extreme values of longitudinal ribs of the two materials were 120 K/cm and 65 K/cm，respectively.
- 共轭传热 /
- 喷流 /
- 单边膨胀 /
- 喷管 /
- 后体 /
- 无人机（UAV）
Abstract: Based on the conjugate heat transfer numerical simulation method，the wall temperature distribution of single expansion after⁃body of a high stealth unmanned aerial vehicle （UAV） was studied.The problem of excessive mesh caused by large area and thin thickness of skin and side plate structure was solved by using thin⁃walled layer mesh.A high⁃precision calculation model was constructed，and the relevant calculation and analysis was completed.The main conclusions were made as follows：although the traditional single fluid calculation can obtain similar temperature distribution，the temperature value was much higher，and the maximum difference can be more than 50 K；the results of conjugate heat transfer calculation were more practical，and could furthermore obtain the temperature gradient distribution in the structure，providing a guidance for thermal stress analysis and structural design；comparing the effects of different metal materials under the same flow conditions，the wall temperature extreme value of a high temperature resistant alloy was about 30 K higher than that of metal steel，and the temperature difference between the upper and lower walls was larger and the gradient was higher.The temperature gradient extreme values of longitudinal ribs of the two materials were 120 K/cm and 65 K/cm，respectively.
- conjugate heat transfer /
- jet flow /
- single expansion /
- nozzle duct /
- after⁃body /
- unmanned aerial vehicle （UAV）
王碧珺

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1 流/固交界面耦合策略示意图

1. Schematic diagram of fluid/solid interface coupling strategy

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2 平板对流换热的计算网格（前缘局部）

2. Computational mesh of the plate convection heat transfer （local part of leading edge）

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3 计算结果与理论解的对比

3. Comparison between the calculated result and the theoretical solution

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4 单边膨胀喷管⁃后体型面示意图

4. Schematic diagram of single expansion nozzle after⁃body surface

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5 单边膨胀喷管⁃后体结构设计示意图

5. Schematic diagram of single expansion nozzle after⁃body structure design

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6 网格示意图（下膨胀边）

6. Mesh schematic diagram （the lower expansion edge）

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7 网格示意图（局部放大）

7. Mesh schematic diagram （local enlarged）

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8 网格示意图（对称面）

8. Mesh schematic diagram （symmetry surface）

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11 计算结果与某试验测试数据对比

11. Comparison of the calculated results with an experiment test data

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13 温度分布的对比（z/D=0截线）

13. Comparison of the temperature distribution （z/D=0 cutline）

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14 温度分布的对比（z/D=0.35截线）

14. Comparison of the temperature distribution （z/D=0.35 cutline）

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15 温度分布的对比（x/L=0.35截线）

15. Comparison of the temperature distribution （x/L =0.35 cutline）

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16 温度分布的对比（x/L=0.52截线）

16. Comparison of the temperature distribution （x/L =0.52 cutline）

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18 金属材料对温度分布的影响（z/D=0截线）

18. Effect of metal material on temperature distribution （z/D=0 cutline）

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19 金属材料对温度分布的影响（x/L=0.52截线）

19. Effect of metal material on temperature distribution （x/L =0.52 cutline）

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表1 网格参数及说明

表1. Mesh parameters and description

参数	数值及说明
参数	网格1	网格2	网格3	网格4
流体网格数/万	455	666	672	912
固体网格数/万	79	115	189	360
网格总数/万	534	781	861	1 272
流体网格粗细	较粗	中间	中间	较细
薄壁网格层数	3	3	5	7

下载: 导出CSV

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