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| Optimization and Experimental Verification of Fuel Throat Ratio of Gunpowder Igniter Based on Interior Trajectory Simulation |
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| DOI：10.7643/issn.1672-9242.2022.12.005 |
| KeyWord:gunpowder igniter interior trajectory simulation reliability of pyrotechnics normal admissibility method fuel throat ratio impulse of ignition |
| Author | Institution |
| LIU Yang |
Beijing Aerospace Power Research Institute, Beijing , China |
| YU Jiang |
Shaanxi Institute of Applied Physical Chemistry, Xi'an , China |
| LI Xue-fei |
Beijing Aerospace Power Research Institute, Beijing , China |
| MA Wen-jie |
Beijing Aerospace Power Research Institute, Beijing , China |
| NIU Lei |
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing , China |
| QI Huan-huan |
Beijing Aerospace Power Research Institute, Beijing , China |
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| Abstract: |
| The work aims to reduce the dispersion of different batches of powder igniter and improve its working reliability. Based on the analysis of the performance and internal ballistic data of different batches of gunpowder igniter, it was found that the performance fluctuation of the agent would significantly affect its working reliability under the constant fuel throat ratio. Therefore, a reasonable fuel throat ratio should be selected according to the performance of the agent under different batch combinations. First, key performance parameters of the new batch of gunpowder igniter were tested by standard test. Then, the internal ballistic parameters near the baseline fuel throat ratio were calculated by establishing the simulation model of gunpowder igniter internal ballistic parameters, which were input into the normal allowable method model based on the historical ignition impulse data. Further, the ignition test was carried out in the preset range of combustion and fuel throat ratio, and the ignition reliability corresponding to different combustion and fuel throat was calculated with the normal allowable limit method. A total of 8 kinds of combustion and fuel throat tests were simulated, and the corresponding reliability was calculated, from 0.177 242 to 0.999 999. According to the reliability calculated by the model and the requirements of related standards of pyrotechnics, the reasonable fuel throat ratio was determined, and more samples were added to further verify its reliability. In addition, the margin test was carried out near the selected fuel throat ratio, and the experimental data were in line with expectations. Through the internal ballistic simulation modeling combined with the reliability test data analysis, the fuel throat ratio is optimized for the gunpowder igniter, and the working reliability approaches 0. 999 908, which is significantly improved compared with the reliability of 0.999 before the improvement. |
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