Water Hammer Characteristics of Self-Rotating Cascade Jets Impacting on Rock.
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| Title: | Water Hammer Characteristics of Self-Rotating Cascade Jets Impacting on Rock. |
|---|---|
| Authors: | Zhang, Di1,2 (AUTHOR), Ge, Zhaolong1,2 (AUTHOR), Zhou, Zhe1,2 (AUTHOR) zhouzhe@cqu.edu.cn, Liu, Xiangjie1,2 (AUTHOR) |
| Source: | Rock Mechanics & Rock Engineering. Apr2024, Vol. 57 Issue 4, p2681-2693. 13p. |
| Subjects: | Water hammer, Analytic geometry, Water pressure, Elasticity, Water jets |
| Abstract: | Water jets impacting the rock cause water hammer effects, resulting in significant damage to the rock. The self-rotating cascade jet breaks rocks through rotational impact, but its water hammer characteristics are still uncertain. The models for water hammer pressure and its duration and dimensionless action length of a cascade jet were constructed using dynamic elasticity and analytic geometry. Moreover, rock-breaking experiments were conducted using a developed cascade nozzle bit to validate the models. The results show that the impact of self-rotating cascade jets on the rock does not generate continuous water hammer pressure. The water hammer characteristics and rock-breaking capacity of the designed jets are ranked as follows: the central jet is the strongest, the first cascade jet is the second strongest, and the second cascade jet is the weakest. The characteristics of the water hammer and rock-breaking capacity for the self-rotating cascade jet increase as the rotational speed and the eccentric distance decrease, the pressure, the impact angle, and the radius increase. The results can lay a theoretical foundation for understanding the rock-breaking mechanism of the self-rotating cascade jet and developing new types of pulsed jets. Highlights: Water hammer models were developed and validated for a self-rotating cascade jet impinging on a rock. The water hammer pressure of a self-rotating cascade jet impinging on the rock was not sustained. The influence of jet property parameters on the water hammer characteristics was demonstrated. [ABSTRACT FROM AUTHOR] |
| Copyright of Rock Mechanics & Rock Engineering is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 177351128 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Water Hammer Characteristics of Self-Rotating Cascade Jets Impacting on Rock. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Di%22">Zhang, Di</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ge%2C+Zhaolong%22">Ge, Zhaolong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Zhe%22">Zhou, Zhe</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> zhouzhe@cqu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Liu%2C+Xiangjie%22">Liu, Xiangjie</searchLink><relatesTo>1,2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Rock+Mechanics+%26+Rock+Engineering%22">Rock Mechanics & Rock Engineering</searchLink>. Apr2024, Vol. 57 Issue 4, p2681-2693. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Water+hammer%22">Water hammer</searchLink><br /><searchLink fieldCode="DE" term="%22Analytic+geometry%22">Analytic geometry</searchLink><br /><searchLink fieldCode="DE" term="%22Water+pressure%22">Water pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Elasticity%22">Elasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Water+jets%22">Water jets</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Water jets impacting the rock cause water hammer effects, resulting in significant damage to the rock. The self-rotating cascade jet breaks rocks through rotational impact, but its water hammer characteristics are still uncertain. The models for water hammer pressure and its duration and dimensionless action length of a cascade jet were constructed using dynamic elasticity and analytic geometry. Moreover, rock-breaking experiments were conducted using a developed cascade nozzle bit to validate the models. The results show that the impact of self-rotating cascade jets on the rock does not generate continuous water hammer pressure. The water hammer characteristics and rock-breaking capacity of the designed jets are ranked as follows: the central jet is the strongest, the first cascade jet is the second strongest, and the second cascade jet is the weakest. The characteristics of the water hammer and rock-breaking capacity for the self-rotating cascade jet increase as the rotational speed and the eccentric distance decrease, the pressure, the impact angle, and the radius increase. The results can lay a theoretical foundation for understanding the rock-breaking mechanism of the self-rotating cascade jet and developing new types of pulsed jets. Highlights: Water hammer models were developed and validated for a self-rotating cascade jet impinging on a rock. The water hammer pressure of a self-rotating cascade jet impinging on the rock was not sustained. The influence of jet property parameters on the water hammer characteristics was demonstrated. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Rock Mechanics & Rock Engineering is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00603-023-03707-3 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 2681 Subjects: – SubjectFull: Water hammer Type: general – SubjectFull: Analytic geometry Type: general – SubjectFull: Water pressure Type: general – SubjectFull: Elasticity Type: general – SubjectFull: Water jets Type: general Titles: – TitleFull: Water Hammer Characteristics of Self-Rotating Cascade Jets Impacting on Rock. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zhang, Di – PersonEntity: Name: NameFull: Ge, Zhaolong – PersonEntity: Name: NameFull: Zhou, Zhe – PersonEntity: Name: NameFull: Liu, Xiangjie IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 07232632 Numbering: – Type: volume Value: 57 – Type: issue Value: 4 Titles: – TitleFull: Rock Mechanics & Rock Engineering Type: main |
| ResultId | 1 |
