Burning characteristics of high density foamed GAP/CL-20 propellants
The monolithic foamed propellants with high densities were prepared by casting and two-step foaming processes. Glycidyl azide polymer (GAP) and isocyanate were used as the binder system and 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (HNIW, CL-20) was employed as the energetic compone...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2022-10-01
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| Series: | Defence Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914721001422 |
| _version_ | 1811339258823180288 |
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| author | Man-man Li Rui Hu Ming-hui Xu Qiong-lin Wang Wei-tao Yang |
| author_facet | Man-man Li Rui Hu Ming-hui Xu Qiong-lin Wang Wei-tao Yang |
| author_sort | Man-man Li |
| collection | DOAJ |
| description | The monolithic foamed propellants with high densities were prepared by casting and two-step foaming processes. Glycidyl azide polymer (GAP) and isocyanate were used as the binder system and 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (HNIW, CL-20) was employed as the energetic component. The newly designed formulation containing 60 % CL-20 produced a force constant of 1077 J/g and low flame temperature of 2817 K. Two foamed propellants with densities of 1.32 g/cm3 and 1.53 g/cm3 were fabricated by a confined foaming process and examined by closed bomb tests. The results revealed that porosity significantly affects burning performance. A size effect on combustion behaviors was observed for the foamed propellant with 5.56 % porosity, and a double-hump progressive dynamic vivacity curve was obtained. At last, the 30 mm gun test was carried out to demonstrate the interior ballistic performance, and the muzzle velocity increased by 120 m/s at the same maximum chamber pressure when monolithic propellant was added in the charge. |
| first_indexed | 2024-04-13T18:23:35Z |
| format | Article |
| id | doaj.art-88879284946a42bb830c35b0d3f88c80 |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-04-13T18:23:35Z |
| publishDate | 2022-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj.art-88879284946a42bb830c35b0d3f88c802022-12-22T02:35:20ZengKeAi Communications Co., Ltd.Defence Technology2214-91472022-10-01181019141921Burning characteristics of high density foamed GAP/CL-20 propellantsMan-man Li0Rui Hu1Ming-hui Xu2Qiong-lin Wang3Wei-tao Yang4Xi'an Modern Chemistry Research Institute, Xi'an, 710065, PR ChinaXi'an Modern Chemistry Research Institute, Xi'an, 710065, PR ChinaXi'an Modern Chemistry Research Institute, Xi'an, 710065, PR ChinaXi'an Modern Chemistry Research Institute, Xi'an, 710065, PR ChinaXi'an Modern Chemistry Research Institute, Xi'an, 710065, PR China; School of Physics, Xi'an Jiaotong University, Xi'an, 710049, PR China; Corresponding author. Xi'an Modern Chemistry Research Institute, Xi'an, 710065, PR China.The monolithic foamed propellants with high densities were prepared by casting and two-step foaming processes. Glycidyl azide polymer (GAP) and isocyanate were used as the binder system and 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (HNIW, CL-20) was employed as the energetic component. The newly designed formulation containing 60 % CL-20 produced a force constant of 1077 J/g and low flame temperature of 2817 K. Two foamed propellants with densities of 1.32 g/cm3 and 1.53 g/cm3 were fabricated by a confined foaming process and examined by closed bomb tests. The results revealed that porosity significantly affects burning performance. A size effect on combustion behaviors was observed for the foamed propellant with 5.56 % porosity, and a double-hump progressive dynamic vivacity curve was obtained. At last, the 30 mm gun test was carried out to demonstrate the interior ballistic performance, and the muzzle velocity increased by 120 m/s at the same maximum chamber pressure when monolithic propellant was added in the charge.http://www.sciencedirect.com/science/article/pii/S2214914721001422Monolithic foamed propellantsTwo-step foaming processCasting processGAP/CL-20 |
| spellingShingle | Man-man Li Rui Hu Ming-hui Xu Qiong-lin Wang Wei-tao Yang Burning characteristics of high density foamed GAP/CL-20 propellants Defence Technology Monolithic foamed propellants Two-step foaming process Casting process GAP/CL-20 |
| title | Burning characteristics of high density foamed GAP/CL-20 propellants |
| title_full | Burning characteristics of high density foamed GAP/CL-20 propellants |
| title_fullStr | Burning characteristics of high density foamed GAP/CL-20 propellants |
| title_full_unstemmed | Burning characteristics of high density foamed GAP/CL-20 propellants |
| title_short | Burning characteristics of high density foamed GAP/CL-20 propellants |
| title_sort | burning characteristics of high density foamed gap cl 20 propellants |
| topic | Monolithic foamed propellants Two-step foaming process Casting process GAP/CL-20 |
| url | http://www.sciencedirect.com/science/article/pii/S2214914721001422 |
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