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| Variation of Convective Heat Transfer Coefficient with Wall Temperature in Aerodynamics Heating |
| Received:February 24, 2025 Revised:March 31, 2025 |
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| DOI：10.7643/issn.1672-9242.2025.05.012 |
| KeyWord:aerodynamic heating wall temperature cold wall heat flux flow/heat transfer coupling convective heat transfer coefficient thermal response |
| Author | Institution |
| LIU Tuo |
Shanghai Electro-Mechanical Engineering Institute, Shanghai , China |
| LI Ruobai |
Shanghai Electro-Mechanical Engineering Institute, Shanghai , China |
| REN Zhiyi |
Shanghai Electro-Mechanical Engineering Institute, Shanghai , China |
| YUE Yansong |
Shanghai Electro-Mechanical Engineering Institute, Shanghai , China |
| HAO Yuchen |
Shanghai Electro-Mechanical Engineering Institute, Shanghai , China |
| XU Quan |
Shanghai Electro-Mechanical Engineering Institute, Shanghai , China |
| CHEN Junming |
Shanghai Electro-Mechanical Engineering Institute, Shanghai , China |
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| Abstract: |
| The work aims to study the convective heat transfer coefficient during the heating process as the wall temperature increases to obtain more accurate results for the aerodynamic heating of vehicles. The flow/heat transfer coupled method was used to simulate the physical process of a typical cylindrical anterior flange aerodynamic heating. The changes in the convective heat transfer coefficient as the wall temperature increased (from 294.4 K to 1 100 K) were investigated and compared with the steady-state cold wall calculation results. As the wall temperature increased, the convective heat transfer coefficient decreased dramatically, and then increased rapidly with the maximum change rate of –8.8%. The maximum change appeared when the wall temperature was 300-340 K, and the change away from the stagnation point tended to decrease. Compared with the flow/heat transfer coupling method, the maximum error of the cold wall heat transfer coefficient in the steady state was 11.2%. As the wall temperature increases, the convective heat transfer coefficient changes significantly. When calculating the temperature with a fixed cold wall convective heat transfer coefficient, it is necessary to consider correction. |
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