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| Analysis of Cook-Off Characteristics of Modular Charges at Different Heating Rates |
| Received:December 23, 2021 Revised:March 04, 2022 |
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| DOI：10.7643/issn.1672-9242.2022.03.002 |
| KeyWord:modular charge ignition temperature cook-off characteristics numerical simulation heating rate temperature cloud pictures |
| Author | Institution |
| LIU Jing |
Academy of Opto-Electronic, China Electronics Technology Group Corporation AOE CETC, Tianjin , China |
| ZHAO Fei-yu |
Academy of Opto-Electronic, China Electronics Technology Group Corporation AOE CETC, Tianjin , China |
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| Abstract: |
| This paper is to study the change of cook-off characteristics of modular charges at different heating rates. Based on the structure of the modular charge and its chemical reaction mechanism, the basic assumptions are put forward, a two-dimensional unsteady cook-off calculation model is established, and the cook-off characteristics of the modular charge under different working conditions are analyzed and studied through numerical simulation. Under the heating rates of 3.30, 5.25, and 7.20 K/h, the ignition temperatures at which the cook-off response of modular charge occurred are 476.6, 473.1 and 477.1 K. When the heating rate is not higher than 5.25 K/h, only one cook-off annular response region located at the single base charge in the radial center section of the module charge is produced; When the heating rate is higher than 5.25 K/h, the center point of the cook-off annular response region changes from a cook-off annular response region located in the radial center section of the module charge to two cook-off annular response regions symmetrical about the radial center section of the module charge. With the increase of heating rate, the center point of the annular response region of the cook-off moves outward from the center to the inner wall region and end face of the modular charge, the response time of cook-off has an exponential relationship with the heating rate, but the change of heating rate has little effect on the response temperature of cook-off. |
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