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| Effect of the Attack Angle on the Reentry Warhead Aerodynamic Heating Environment and Structure Thermal Response |
| Received:February 03, 2021 Revised:February 26, 2021 |
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| DOI：10.7643/issn.1672-9242.2021.03.011 |
| KeyWord:the angle of attack oscillation of the attack angle aerodynamic heating structure thermal response |
| Author | Institution |
| SHAN Ji-xiang |
Institute of System Engineering, CAEP, Mianyang , China |
| CHEN Qiang-hong |
Institute of System Engineering, CAEP, Mianyang , China |
| ZHAO Ping |
Institute of System Engineering, CAEP, Mianyang , China |
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| Abstract: |
| The paper aims to study the effect of the flying attack angle on the aerodynamic heating environment and structure thermal response of reentry warhead. A coupling calculation method based on engineering algorithm for the aerodynamic heating environment and structure thermal response was built, and the aerodynamic heating environment and structure thermal response of the reentry warhead were calculated and the effect of the attack angle was studied based on this method. With the oscillation attenuation of the reentry attack angle, the heat flux curve on every typical meridian plane oscillates around the curve in 90° meridian plane and the amplitude first increases and then decreases. The total reentry heat transfers in all typical planes increases compared with that in 90° meridian plane. The maximal amplitude of the temperature on the metal layer due to the oscillation attenuation of the attack angle is 3 K during reentry process, while it has little effect on the structure temperature at last time. In the computational ballistic condition,the oscillation attenuation of the attack angle has little effect on aerodynamic heating environment and structure thermal response ,which can be improved by increasing allowance. |
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