Motion characteristics and laws of the debris from a near-space nuclear detonation
Background The debris motion is an important phenomenon of a high-altitude nuclear detonation, which is also a foundation for the study of the geophysical phenomena such as the ionosphere effect and artificial radiation belt. Purpose The study aims to clarify the debris motion ch...
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| Format: | Article |
| Language: | zho |
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Science Press
2022-10-01
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| Series: | He jishu |
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| Online Access: | https://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2022.hjs.45.100503&lang=zh |
| _version_ | 1811169648846045184 |
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| author | LIU Li NIU Shengli ZHU Jinhui ZUO Yinghong XIE Honggang |
| author_facet | LIU Li NIU Shengli ZHU Jinhui ZUO Yinghong XIE Honggang |
| author_sort | LIU Li |
| collection | DOAJ |
| description | Background The debris motion is an important phenomenon of a high-altitude nuclear detonation, which is also a foundation for the study of the geophysical phenomena such as the ionosphere effect and artificial radiation belt. Purpose The study aims to clarify the debris motion characteristics and laws from a near-space nuclear detonation. Methods Firstly, a fluid dynamics model of debris motion from a near-space nuclear detonation was established. Many influence factors were considered, such as the variation of energy dissipation, air density varies with height, gravity, air temperature rise caused by X-ray depositions and radiation cooling. Then the parameters of debris motion within the explosion equivalent of 1 kt~10 Mt and the explosion height of 30~80 km were systematically studied. The evolutions of parameters such as center height, horizontal radius, expanding velocity, ascending velocity, and shape of debris were given. Finally, the variation laws of typical characteristic parameters such as maximum ascending height and expanding radius changing with explosion height and explosion equivalent were summarized. Results When the explosion height is 30 km, the maximum rising height and the maximum horizontal radius at 5 min for a kiloton-level nuclear explosion debris are about 13~16 km and 4~5 km, the maximum rising height and the maximum horizontal radius at 5 min for a megaton-level nuclear explosion debris are about 20~40 km and 15~30 km. When the explosion height is 80 km, the maximum rising height and the maximum horizontal radius at 5 min for a kiloton-level nuclear explosion debris are about 30~50 km and 20~40 km, the maximum rising height and the maximum horizontal radius at 5 min for a megaton-level nuclear explosion debris are about 200~400 km and 110~220 km. When the explosion equivalent is small and the explosive height is low, the debris evolves into a flat ellipsoid. When the explosion equivalent is large and the explosion height is high, the debris evolves into an inverted pear shape. Conclusions The results show that the maximum height, horizontal radius, and speed of the debris cloud increase with the increase in the explosion height and explosion equivalent. The changes of the height, the horizontal radius, the rising time, and the shape of the debris obtained from the study are in good agreement with the literature estimation method. Those obtained motion parameters of debris can provide delayed radiation source information for the study of the geophysical phenomena such as the ionosphere effect and artificial radiation belt of nuclear explosion in near-space. |
| first_indexed | 2024-04-10T16:45:42Z |
| format | Article |
| id | doaj.art-a3b9872c90e144b794511900d9c8c550 |
| institution | Directory Open Access Journal |
| issn | 0253-3219 |
| language | zho |
| last_indexed | 2024-04-10T16:45:42Z |
| publishDate | 2022-10-01 |
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| spelling | doaj.art-a3b9872c90e144b794511900d9c8c5502023-02-08T01:04:30ZzhoScience PressHe jishu0253-32192022-10-01451010050310050310.11889/j.0253-3219.2022.hjs.45.1005030253-3219（2022）10-0069-08Motion characteristics and laws of the debris from a near-space nuclear detonationLIU LiNIU ShengliZHU JinhuiZUO YinghongXIE HonggangBackground The debris motion is an important phenomenon of a high-altitude nuclear detonation, which is also a foundation for the study of the geophysical phenomena such as the ionosphere effect and artificial radiation belt. Purpose The study aims to clarify the debris motion characteristics and laws from a near-space nuclear detonation. Methods Firstly, a fluid dynamics model of debris motion from a near-space nuclear detonation was established. Many influence factors were considered, such as the variation of energy dissipation, air density varies with height, gravity, air temperature rise caused by X-ray depositions and radiation cooling. Then the parameters of debris motion within the explosion equivalent of 1 kt~10 Mt and the explosion height of 30~80 km were systematically studied. The evolutions of parameters such as center height, horizontal radius, expanding velocity, ascending velocity, and shape of debris were given. Finally, the variation laws of typical characteristic parameters such as maximum ascending height and expanding radius changing with explosion height and explosion equivalent were summarized. Results When the explosion height is 30 km, the maximum rising height and the maximum horizontal radius at 5 min for a kiloton-level nuclear explosion debris are about 13~16 km and 4~5 km, the maximum rising height and the maximum horizontal radius at 5 min for a megaton-level nuclear explosion debris are about 20~40 km and 15~30 km. When the explosion height is 80 km, the maximum rising height and the maximum horizontal radius at 5 min for a kiloton-level nuclear explosion debris are about 30~50 km and 20~40 km, the maximum rising height and the maximum horizontal radius at 5 min for a megaton-level nuclear explosion debris are about 200~400 km and 110~220 km. When the explosion equivalent is small and the explosive height is low, the debris evolves into a flat ellipsoid. When the explosion equivalent is large and the explosion height is high, the debris evolves into an inverted pear shape. Conclusions The results show that the maximum height, horizontal radius, and speed of the debris cloud increase with the increase in the explosion height and explosion equivalent. The changes of the height, the horizontal radius, the rising time, and the shape of the debris obtained from the study are in good agreement with the literature estimation method. Those obtained motion parameters of debris can provide delayed radiation source information for the study of the geophysical phenomena such as the ionosphere effect and artificial radiation belt of nuclear explosion in near-space.https://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2022.hjs.45.100503&lang=zhnear-space nuclear detonationdebriscomputational modelmotion law |
| spellingShingle | LIU Li NIU Shengli ZHU Jinhui ZUO Yinghong XIE Honggang Motion characteristics and laws of the debris from a near-space nuclear detonation He jishu near-space nuclear detonation debris computational model motion law |
| title | Motion characteristics and laws of the debris from a near-space nuclear detonation |
| title_full | Motion characteristics and laws of the debris from a near-space nuclear detonation |
| title_fullStr | Motion characteristics and laws of the debris from a near-space nuclear detonation |
| title_full_unstemmed | Motion characteristics and laws of the debris from a near-space nuclear detonation |
| title_short | Motion characteristics and laws of the debris from a near-space nuclear detonation |
| title_sort | motion characteristics and laws of the debris from a near space nuclear detonation |
| topic | near-space nuclear detonation debris computational model motion law |
| url | https://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2022.hjs.45.100503&lang=zh |
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