Evolutions of induced electromagnetic signatures of submarine under natural cavitation
ObjectiveThe induced electromagnetic properties brought forth by disturbed seawater cutting the geomagnetic field can provide important information for non-acoustic detection technologies. In view of the complex and highly nonlinear interaction between the flow field and electromagnetic field of a h...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Editorial Office of Chinese Journal of Ship Research
2023-08-01
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| Series: | Zhongguo Jianchuan Yanjiu |
| Subjects: | |
| Online Access: | http://www.ship-research.com/en/article/doi/10.19693/j.issn.1673-3185.03246 |
| _version_ | 1797692520992342016 |
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| author | E PENG Shengnan ZOU Shizhu LI Linying LIU |
| author_facet | E PENG Shengnan ZOU Shizhu LI Linying LIU |
| author_sort | E PENG |
| collection | DOAJ |
| description | ObjectiveThe induced electromagnetic properties brought forth by disturbed seawater cutting the geomagnetic field can provide important information for non-acoustic detection technologies. In view of the complex and highly nonlinear interaction between the flow field and electromagnetic field of a high-speed submarine, it is necessary to deeply analyze the influence of the turbulence structure caused by natural cavitation on the induced electromagnetic field.MethodsFirst, a multi-physical field mathematical model of fluid-electromagnetic coupling is established on the basis of hydrodynamics and electromagnetics. Next, the intensity and range of near-field electromagnetic signatures in the cavitation evolution, and the time-frequency characteristics of the induced electric field under different cavitation numbers, are obtained through numerical simulation using Fluent software.ResultsThe simulation results demonstrate that the electromagnetic field shows obvious quasi-periodic unsteady fluctuation features due to the evolution of the cavitation morphology. The magnitudes of the induced electric field and magnetic field are 10−1 mV/m and 10−2 nT respectively, which are within the detection range of the most sophisticated sensors. Additionally, the cavitation number is highly correlated with the time-frequency characteristics of the induced electric field. When the cavitation number decreases from 0.4 to 0.2, the fluctuation intensity of the induced electric field is significantly enhanced, its main frequency decreases from 49.94 Hz to 34.19 Hz, and the low-frequency fluctuation component increases accordingly.ConclusionThe induced electromagnetic characteristics of submarines can be employed to guide the non-acoustic detection of underwater moving bodies, and the main frequency range of the induced electric field can provide references for the electromagnetic communication frequency selection of high-speed submarines. |
| first_indexed | 2024-03-12T02:28:48Z |
| format | Article |
| id | doaj.art-397513ded7b4428482b1329744ffb3c6 |
| institution | Directory Open Access Journal |
| issn | 1673-3185 |
| language | English |
| last_indexed | 2024-03-12T02:28:48Z |
| publishDate | 2023-08-01 |
| publisher | Editorial Office of Chinese Journal of Ship Research |
| record_format | Article |
| series | Zhongguo Jianchuan Yanjiu |
| spelling | doaj.art-397513ded7b4428482b1329744ffb3c62023-09-05T09:18:25ZengEditorial Office of Chinese Journal of Ship ResearchZhongguo Jianchuan Yanjiu1673-31852023-08-0118414015010.19693/j.issn.1673-3185.03246ZG3246Evolutions of induced electromagnetic signatures of submarine under natural cavitationE PENG0Shengnan ZOU1Shizhu LI2Linying LIU3School of Advanced Manufacturing, Fuzhou University, Quanzhou 362251, ChinaQuanzhou Institute of Equipment Manufacturing, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Quanzhou 362216, ChinaQuanzhou Institute of Equipment Manufacturing, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Quanzhou 362216, ChinaQuanzhou Institute of Equipment Manufacturing, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Quanzhou 362216, ChinaObjectiveThe induced electromagnetic properties brought forth by disturbed seawater cutting the geomagnetic field can provide important information for non-acoustic detection technologies. In view of the complex and highly nonlinear interaction between the flow field and electromagnetic field of a high-speed submarine, it is necessary to deeply analyze the influence of the turbulence structure caused by natural cavitation on the induced electromagnetic field.MethodsFirst, a multi-physical field mathematical model of fluid-electromagnetic coupling is established on the basis of hydrodynamics and electromagnetics. Next, the intensity and range of near-field electromagnetic signatures in the cavitation evolution, and the time-frequency characteristics of the induced electric field under different cavitation numbers, are obtained through numerical simulation using Fluent software.ResultsThe simulation results demonstrate that the electromagnetic field shows obvious quasi-periodic unsteady fluctuation features due to the evolution of the cavitation morphology. The magnitudes of the induced electric field and magnetic field are 10−1 mV/m and 10−2 nT respectively, which are within the detection range of the most sophisticated sensors. Additionally, the cavitation number is highly correlated with the time-frequency characteristics of the induced electric field. When the cavitation number decreases from 0.4 to 0.2, the fluctuation intensity of the induced electric field is significantly enhanced, its main frequency decreases from 49.94 Hz to 34.19 Hz, and the low-frequency fluctuation component increases accordingly.ConclusionThe induced electromagnetic characteristics of submarines can be employed to guide the non-acoustic detection of underwater moving bodies, and the main frequency range of the induced electric field can provide references for the electromagnetic communication frequency selection of high-speed submarines.http://www.ship-research.com/en/article/doi/10.19693/j.issn.1673-3185.03246natural cavitationmulti-physicsinduced electromagnetic signaturesnon-acoustic detection |
| spellingShingle | E PENG Shengnan ZOU Shizhu LI Linying LIU Evolutions of induced electromagnetic signatures of submarine under natural cavitation Zhongguo Jianchuan Yanjiu natural cavitation multi-physics induced electromagnetic signatures non-acoustic detection |
| title | Evolutions of induced electromagnetic signatures of submarine under natural cavitation |
| title_full | Evolutions of induced electromagnetic signatures of submarine under natural cavitation |
| title_fullStr | Evolutions of induced electromagnetic signatures of submarine under natural cavitation |
| title_full_unstemmed | Evolutions of induced electromagnetic signatures of submarine under natural cavitation |
| title_short | Evolutions of induced electromagnetic signatures of submarine under natural cavitation |
| title_sort | evolutions of induced electromagnetic signatures of submarine under natural cavitation |
| topic | natural cavitation multi-physics induced electromagnetic signatures non-acoustic detection |
| url | http://www.ship-research.com/en/article/doi/10.19693/j.issn.1673-3185.03246 |
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