Simulation Study of the Transport Characteristics of the Ice Core in Ice Drilling with Air Reverse Circulation
Ice core drilling with air reverse circulation is a promising technology that uses high-speed airflow to transport the ice core from the bottom of the hole along the central passage of the drill pipe to the surface. Understanding how the ice core moves through the pipe is crucial for this technology...
| Glavni autori: | , , , , , |
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| Format: | Članak |
| Jezik: | English |
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MDPI AG
2022-10-01
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| Serija: | Journal of Marine Science and Engineering |
| Teme: | |
| Online pristup: | https://www.mdpi.com/2077-1312/10/11/1603 |
| _version_ | 1827646465247281152 |
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| author | Mengke Wang Wenbo He Jine Cao Bo Qi Jingchao Chen Pinlu Cao |
| author_facet | Mengke Wang Wenbo He Jine Cao Bo Qi Jingchao Chen Pinlu Cao |
| author_sort | Mengke Wang |
| collection | DOAJ |
| description | Ice core drilling with air reverse circulation is a promising technology that uses high-speed airflow to transport the ice core from the bottom of the hole along the central passage of the drill pipe to the surface. Understanding how the ice core moves through the pipe is crucial for this technology in order to calculate the pneumatic parameters. In this paper, experimental study and the CFD dynamic mesh technique are used to analyze the ice core transport process and flow field characteristics. In order to prove the correctness of the dynamic mesh technique, the simulation results were verified with the experimental results, and it was found that all the simulation data were in agreement with the experimental data trend, and the maximum error was less than 10%. According to the study, once the ice core’s velocity reaches its maximum throughout the transport process, it does not change. The ice core’s maximum velocity increases with the diameter ratio and decreases with the length-to-diameter ratio, while eccentricity has no impact on the maximum velocity. When the air velocity reaches 21 m/s, the diameter ratio for the ice core with a length-to-diameter ratio of 2 increases from 0.80 to 0.92, and the maximum velocity increases from 8.92 m/s to 17.45 m/s. Data fitting demonstrates that the equation <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>V</mi><mrow><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub><mo>=</mo><mo>−</mo><mn>1.04</mn><msub><mi>V</mi><mn>0</mn></msub><mo> </mo><mo>+</mo><mo> </mo><mn>1.04</mn><msub><mi>V</mi><mi>a</mi></msub></mrow></semantics></math></inline-formula> describes the relationship between the ice core’s maximum velocity, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>V</mi><mrow><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub></mrow></semantics></math></inline-formula>, and air velocity, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>V</mi><mi>a</mi></msub></mrow></semantics></math></inline-formula>. Finally, we obtain the ice core’s suspension velocity model using CFD simulation to calculate the suspension velocity, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>V</mi><mn>0</mn></msub></mrow></semantics></math></inline-formula>. |
| first_indexed | 2024-03-09T18:57:12Z |
| format | Article |
| id | doaj.art-f23f660c2f1f4b61bc0221eec59b7291 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T18:57:12Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-f23f660c2f1f4b61bc0221eec59b72912023-11-24T05:21:36ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-10-011011160310.3390/jmse10111603Simulation Study of the Transport Characteristics of the Ice Core in Ice Drilling with Air Reverse CirculationMengke Wang0Wenbo He1Jine Cao2Bo Qi3Jingchao Chen4Pinlu Cao5Polar Research Center, Jilin University, No. 938 Ximinzhu Str., Changchun 130061, ChinaPolar Research Center, Jilin University, No. 938 Ximinzhu Str., Changchun 130061, ChinaPolar Research Center, Jilin University, No. 938 Ximinzhu Str., Changchun 130061, ChinaChangchun Institute of Technology, No. 395 Kuanping Rd., Changchun 130012, ChinaPolar Research Center, Jilin University, No. 938 Ximinzhu Str., Changchun 130061, ChinaPolar Research Center, Jilin University, No. 938 Ximinzhu Str., Changchun 130061, ChinaIce core drilling with air reverse circulation is a promising technology that uses high-speed airflow to transport the ice core from the bottom of the hole along the central passage of the drill pipe to the surface. Understanding how the ice core moves through the pipe is crucial for this technology in order to calculate the pneumatic parameters. In this paper, experimental study and the CFD dynamic mesh technique are used to analyze the ice core transport process and flow field characteristics. In order to prove the correctness of the dynamic mesh technique, the simulation results were verified with the experimental results, and it was found that all the simulation data were in agreement with the experimental data trend, and the maximum error was less than 10%. According to the study, once the ice core’s velocity reaches its maximum throughout the transport process, it does not change. The ice core’s maximum velocity increases with the diameter ratio and decreases with the length-to-diameter ratio, while eccentricity has no impact on the maximum velocity. When the air velocity reaches 21 m/s, the diameter ratio for the ice core with a length-to-diameter ratio of 2 increases from 0.80 to 0.92, and the maximum velocity increases from 8.92 m/s to 17.45 m/s. Data fitting demonstrates that the equation <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>V</mi><mrow><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub><mo>=</mo><mo>−</mo><mn>1.04</mn><msub><mi>V</mi><mn>0</mn></msub><mo> </mo><mo>+</mo><mo> </mo><mn>1.04</mn><msub><mi>V</mi><mi>a</mi></msub></mrow></semantics></math></inline-formula> describes the relationship between the ice core’s maximum velocity, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>V</mi><mrow><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub></mrow></semantics></math></inline-formula>, and air velocity, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>V</mi><mi>a</mi></msub></mrow></semantics></math></inline-formula>. Finally, we obtain the ice core’s suspension velocity model using CFD simulation to calculate the suspension velocity, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>V</mi><mn>0</mn></msub></mrow></semantics></math></inline-formula>.https://www.mdpi.com/2077-1312/10/11/1603air reverse circulationtransport characteristicmaximum velocitystreamline pattern |
| spellingShingle | Mengke Wang Wenbo He Jine Cao Bo Qi Jingchao Chen Pinlu Cao Simulation Study of the Transport Characteristics of the Ice Core in Ice Drilling with Air Reverse Circulation Journal of Marine Science and Engineering air reverse circulation transport characteristic maximum velocity streamline pattern |
| title | Simulation Study of the Transport Characteristics of the Ice Core in Ice Drilling with Air Reverse Circulation |
| title_full | Simulation Study of the Transport Characteristics of the Ice Core in Ice Drilling with Air Reverse Circulation |
| title_fullStr | Simulation Study of the Transport Characteristics of the Ice Core in Ice Drilling with Air Reverse Circulation |
| title_full_unstemmed | Simulation Study of the Transport Characteristics of the Ice Core in Ice Drilling with Air Reverse Circulation |
| title_short | Simulation Study of the Transport Characteristics of the Ice Core in Ice Drilling with Air Reverse Circulation |
| title_sort | simulation study of the transport characteristics of the ice core in ice drilling with air reverse circulation |
| topic | air reverse circulation transport characteristic maximum velocity streamline pattern |
| url | https://www.mdpi.com/2077-1312/10/11/1603 |
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