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| Numerical Analysis on the Thermal Safety of Solid Rocket Motor Propellant |
| Received:December 05, 2015 Revised:April 15, 2016 |
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| DOI：10.7643/issn.1672-9242.2016.02.023 |
| KeyWord:solid propellant cook-off explosion delay time |
| Author | Institution |
| LIU Wen-yi |
Unit 91of PLA 91550， Dalian ， China |
| JIAO Ji-guang |
Unit 91of PLA 91550， Dalian ， China |
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| Abstract: |
| Objective To investigate the safety of solid rocket motor（SRM）when it was cook-off. Methods Finite element model of solid SRM was established, and the temperature distribution and the explosion delay time of propellant in fast cook-off mode and slow cook- off mode were computed. Results Propellant reached its critical temperature (352 ℃ ) after 47 h slow cook-off, while it reached its critical temperature (355 ℃ ) after 697 s fast cook-off. Conclusion It was proven that the thermal diffusivity in fast cook-off mode was greater than that in slow cook-off mode, while the temperature gradient had an opposite trend. The reaction position of propellant was different in the two different working modes when it reached critical temperature, and the thermal storage capacity of propellant was dependent on its thickness. |
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