Numerical Simulation Study of a Swirling Drill Bit Used for Ice Core Drilling
Due to its high mechanical penetration rate and lack of pollution of the environment, air reverse circulation drilling is considered to be a promising method for ice drilling. The air reverse circulation is caused by the combination of the ejector and the flushing nozzles in the drill bit. In this p...
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ftdoajarticles:oai:doaj.org/article:8b392f576a354344920d4e56abfd0966 2023-05-15T16:38:48+02:00 Numerical Simulation Study of a Swirling Drill Bit Used for Ice Core Drilling Mengke Wang Wenbo He Minqi Wang Jine Cao Pinlu Cao 2022-02-01T00:00:00Z https://doi.org/10.3390/jmse10020296 https://doaj.org/article/8b392f576a354344920d4e56abfd0966 EN eng MDPI AG https://www.mdpi.com/2077-1312/10/2/296 https://doaj.org/toc/2077-1312 doi:10.3390/jmse10020296 2077-1312 https://doaj.org/article/8b392f576a354344920d4e56abfd0966 Journal of Marine Science and Engineering, Vol 10, Iss 296, p 296 (2022) swirling flow air drilling reverse circulation ice core drilling Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 article 2022 ftdoajarticles https://doi.org/10.3390/jmse10020296 2022-12-31T09:46:10Z Due to its high mechanical penetration rate and lack of pollution of the environment, air reverse circulation drilling is considered to be a promising method for ice drilling. The air reverse circulation is caused by the combination of the ejector and the flushing nozzles in the drill bit. In this paper, CFD software was used to simulate the influence of the structure of the swirler on the effect of air reverse circulation in the swirling drill bit, and a testing stand was established for the testing of air reverse circulation. The results show that for drill bits without flushing nozzles, the smaller the helical angle is, the larger the entrainment ratio will be, meanwhile the smaller the area ratio is, the larger the entrainment ratio will be. In contrast, for drill bits designed with flushing nozzles, the larger the helical angle is, the larger the entrainment ratio will be, and the larger the area ratio is, the larger the entrainment ratio will be. In addition, the presence of the ice core sharply reduces the effect of air reverse circulation. When the ice core’s height exceeds that of the outlet of the swirler, the reverse circulation effect is slightly improved. Article in Journal/Newspaper ice core Directory of Open Access Journals: DOAJ Articles Journal of Marine Science and Engineering 10 2 296 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
swirling flow air drilling reverse circulation ice core drilling Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
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swirling flow air drilling reverse circulation ice core drilling Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Mengke Wang Wenbo He Minqi Wang Jine Cao Pinlu Cao Numerical Simulation Study of a Swirling Drill Bit Used for Ice Core Drilling |
topic_facet |
swirling flow air drilling reverse circulation ice core drilling Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
description |
Due to its high mechanical penetration rate and lack of pollution of the environment, air reverse circulation drilling is considered to be a promising method for ice drilling. The air reverse circulation is caused by the combination of the ejector and the flushing nozzles in the drill bit. In this paper, CFD software was used to simulate the influence of the structure of the swirler on the effect of air reverse circulation in the swirling drill bit, and a testing stand was established for the testing of air reverse circulation. The results show that for drill bits without flushing nozzles, the smaller the helical angle is, the larger the entrainment ratio will be, meanwhile the smaller the area ratio is, the larger the entrainment ratio will be. In contrast, for drill bits designed with flushing nozzles, the larger the helical angle is, the larger the entrainment ratio will be, and the larger the area ratio is, the larger the entrainment ratio will be. In addition, the presence of the ice core sharply reduces the effect of air reverse circulation. When the ice core’s height exceeds that of the outlet of the swirler, the reverse circulation effect is slightly improved. |
format |
Article in Journal/Newspaper |
author |
Mengke Wang Wenbo He Minqi Wang Jine Cao Pinlu Cao |
author_facet |
Mengke Wang Wenbo He Minqi Wang Jine Cao Pinlu Cao |
author_sort |
Mengke Wang |
title |
Numerical Simulation Study of a Swirling Drill Bit Used for Ice Core Drilling |
title_short |
Numerical Simulation Study of a Swirling Drill Bit Used for Ice Core Drilling |
title_full |
Numerical Simulation Study of a Swirling Drill Bit Used for Ice Core Drilling |
title_fullStr |
Numerical Simulation Study of a Swirling Drill Bit Used for Ice Core Drilling |
title_full_unstemmed |
Numerical Simulation Study of a Swirling Drill Bit Used for Ice Core Drilling |
title_sort |
numerical simulation study of a swirling drill bit used for ice core drilling |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/jmse10020296 https://doaj.org/article/8b392f576a354344920d4e56abfd0966 |
genre |
ice core |
genre_facet |
ice core |
op_source |
Journal of Marine Science and Engineering, Vol 10, Iss 296, p 296 (2022) |
op_relation |
https://www.mdpi.com/2077-1312/10/2/296 https://doaj.org/toc/2077-1312 doi:10.3390/jmse10020296 2077-1312 https://doaj.org/article/8b392f576a354344920d4e56abfd0966 |
op_doi |
https://doi.org/10.3390/jmse10020296 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
10 |
container_issue |
2 |
container_start_page |
296 |
_version_ |
1766029141742714880 |