Scour Caused by a Propeller Jet.
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| Title: | Scour Caused by a Propeller Jet. |
|---|---|
| Authors: | Hong, Jian-Hao, Chiew, Yee-Meng1, Cheng, Nian-Sheng2 |
| Source: | Journal of Hydraulic Engineering. Sep2013, Vol. 139 Issue 9, p1003-1012. 10p. 1 Color Photograph, 1 Diagram, 2 Charts, 13 Graphs. |
| Subjects: | Scour (Hydraulic engineering), Propeller-driven aircraft, Jet planes, Sediments, Polynomials |
| Abstract: | The scour hole induced by a propeller wash is experimentally investigated with noncohesive sediments. The associated scour profile at the asymptotic condition, which can be expressed by a combination of three polynomials, comprises (1) a small scour hole beneath the propeller, (2) a primary scour hole downstream of the small scour hole, and (3) a deposition mound farther downstream of the primary scour hole. The time-dependent maximum scour depth induced by propeller jets is closely related to the densimetric Froude number, a reference time scale, offset height relative to the propeller diameter, and sediment size. A semiempirical formula, which shows good agreement with the experimental data, is proposed to describe evolution of the maximum scour depth. An equation for the determination of the time to initiate scour is also proposed. Moreover, empirical equations for the maximum asymptotic scour depth induced by a propeller and three-dimensional submerged offset jets agree well with the experimental data. The critical condition for the initiation of scour caused by propeller and offset jets is also presented. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Hydraulic Engineering is the property of American Society of Civil Engineers 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 |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 89566584 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Scour Caused by a Propeller Jet. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Hong%2C+Jian-Hao%22">Hong, Jian-Hao</searchLink><br /><searchLink fieldCode="AR" term="%22Chiew%2C+Yee-Meng%22">Chiew, Yee-Meng</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Cheng%2C+Nian-Sheng%22">Cheng, Nian-Sheng</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Hydraulic+Engineering%22">Journal of Hydraulic Engineering</searchLink>. Sep2013, Vol. 139 Issue 9, p1003-1012. 10p. 1 Color Photograph, 1 Diagram, 2 Charts, 13 Graphs. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Scour+%28Hydraulic+engineering%29%22">Scour (Hydraulic engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Propeller-driven+aircraft%22">Propeller-driven aircraft</searchLink><br /><searchLink fieldCode="DE" term="%22Jet+planes%22">Jet planes</searchLink><br /><searchLink fieldCode="DE" term="%22Sediments%22">Sediments</searchLink><br /><searchLink fieldCode="DE" term="%22Polynomials%22">Polynomials</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The scour hole induced by a propeller wash is experimentally investigated with noncohesive sediments. The associated scour profile at the asymptotic condition, which can be expressed by a combination of three polynomials, comprises (1) a small scour hole beneath the propeller, (2) a primary scour hole downstream of the small scour hole, and (3) a deposition mound farther downstream of the primary scour hole. The time-dependent maximum scour depth induced by propeller jets is closely related to the densimetric Froude number, a reference time scale, offset height relative to the propeller diameter, and sediment size. A semiempirical formula, which shows good agreement with the experimental data, is proposed to describe evolution of the maximum scour depth. An equation for the determination of the time to initiate scour is also proposed. Moreover, empirical equations for the maximum asymptotic scour depth induced by a propeller and three-dimensional submerged offset jets agree well with the experimental data. The critical condition for the initiation of scour caused by propeller and offset jets is also presented. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Hydraulic Engineering is the property of American Society of Civil Engineers 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: 10.1061/(ASCE)HY.1943-7900.0000746 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 1003 Subjects: – SubjectFull: Scour (Hydraulic engineering) Type: general – SubjectFull: Propeller-driven aircraft Type: general – SubjectFull: Jet planes Type: general – SubjectFull: Sediments Type: general – SubjectFull: Polynomials Type: general Titles: – TitleFull: Scour Caused by a Propeller Jet. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Hong, Jian-Hao – PersonEntity: Name: NameFull: Chiew, Yee-Meng – PersonEntity: Name: NameFull: Cheng, Nian-Sheng IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2013 Type: published Y: 2013 Identifiers: – Type: issn-print Value: 07339429 Numbering: – Type: volume Value: 139 – Type: issue Value: 9 Titles: – TitleFull: Journal of Hydraulic Engineering Type: main |
| ResultId | 1 |
