| ZrB_2-SiC前缘构件气动加热及热应力的数值模拟分析 |
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| 引用本文： | 蔺晓轩,武海棠,魏玺,沈志洵,张伟刚.ZrB_2-SiC前缘构件气动加热及热应力的数值模拟分析[J].过程工程学报,2010,10(3):417-423. |
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| 作者姓名： | 蔺晓轩 武海棠 魏玺 沈志洵 张伟刚 |
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| 作者单位： | 1. 中国科学院过程工程研究所多相复杂系统国家重点实验室,北京,100190;中国科学院研究生院,北京,100049
2. 中国科学院过程工程研究所多相复杂系统国家重点实验室,北京,100190 |
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| 基金项目： | 中国科学院知识创新工程重要方向基金资助项目 |
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| 摘 要： | 分别采用有限差分法和有限单元法对ZrB2-SiC前缘构件高超声速气动加热过程及其内部热应力进行了数值模拟,并以电弧风洞地面模拟实验对计算结果进行了验证.计算结果表明,飞行马赫数为6、总温2375K、总压4.41MPa、结构前缘半径为0.125mm时,5s时驻点温度达1870K,内部最大热应力达1240MPa,这将导致服役过程中材料失效.电弧风洞实验结果表明,5s时驻点温度达2175K,材料前缘因承受的应力超过其弯曲强度而断裂.计算结果与风洞实验结果吻合较好.
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| 关 键 词： | ZrB2-SiC 数值模拟 前缘 气动加热 热应力 |
| 收稿时间： | 2010-3-2 |
| 修稿时间： | 2010-4-16 |
Numerical Simulation on Aerodynamic Heating and Thermal Stress of ZrB2-SiC Leading Edge |
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| LIN Xiao-xuan,WU Hai-tang,WEI Xi,SHEN Zhi-xun,ZHANG Wei-gang.Numerical Simulation on Aerodynamic Heating and Thermal Stress of ZrB2-SiC Leading Edge[J].Chinese Journal of Process Engineering,2010,10(3):417-423. |
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| Authors: | LIN Xiao-xuan WU Hai-tang WEI Xi SHEN Zhi-xun ZHANG Wei-gang |
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| Affiliation: | LIN Xiao-xuan1,2,WU Hai-tang1,WEI Xi1,SHEN Zhi-xun1,ZHANG Wei-gang1 (1. State Key Lab. Multiphase Complex System,Inst. Process Eng.,Chinese Academy of Sciences,Beijing 100190,China,2. Graduate University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | Aerodynamic heating process and thermal stress of ZrB2-SiC leading edge as the component of scramjet engines were numerically investigated by finite-difference and finite-element methods, and the simulation results were verified through thermal structure tests with arc-heated wind tunnels. Simulation results showed that the temperature at stagnation point reached 1870 K in 5 s, and thermal stress of structure was up to 1240 MPa which was beyond the fracture strength of ZrB2-SiC material, when the inflow Mac... |
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| Keywords: | ZrB2-SiC |
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