Numerical analyses for improved terminal velocity of deep water torpedo anchor

Boonping Soh, William Pao, Xiaohui Chen

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Purpose: This research aims to investigate the effects of manipulation of a torpedo’s geometries to attain higher terminal velocity. The parameters of interest include geometric changes of the original design, as well as sea water properties that reflect water depth in South China Sea. Design/methodology/approach: The research make use of computational fluid dynamics (CFD) software, FLUENT, to solve viscous incompressible Navier–Stokes equations with two equations k-epsilon turbulent model. The calculated drag coefficient is subsequently used to calculate the maximum attainable terminal velocity of the torpedo. Findings: It was found that the terminal velocity can be improved by sharper tip angle, greater aspect ratio, greater diameter ratio and optimum rear angle at 30°. Sensitivity of drag coefficient toward each of the parameters is established in this paper. Originality/value: The paper, in addition to verifying the importance of aspect ratio, has also established the tip angle, diameter ratio and rear angle of the torpedo as important geometric aspects that could be tuned to improve its terminal velocity.
Original languageEnglish
Pages (from-to)428-443
Number of pages16
JournalInternational Journal of Numerical Methods for Heat & Fluid Flow
Volume27
Issue number2
DOIs
Publication statusPublished - 21 Mar 2017
Externally publishedYes

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Anchors
Drag coefficient
Aspect ratio
Water
Computational fluid dynamics
Geometry

Cite this

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title = "Numerical analyses for improved terminal velocity of deep water torpedo anchor",
abstract = "Purpose: This research aims to investigate the effects of manipulation of a torpedo’s geometries to attain higher terminal velocity. The parameters of interest include geometric changes of the original design, as well as sea water properties that reflect water depth in South China Sea. Design/methodology/approach: The research make use of computational fluid dynamics (CFD) software, FLUENT, to solve viscous incompressible Navier–Stokes equations with two equations k-epsilon turbulent model. The calculated drag coefficient is subsequently used to calculate the maximum attainable terminal velocity of the torpedo. Findings: It was found that the terminal velocity can be improved by sharper tip angle, greater aspect ratio, greater diameter ratio and optimum rear angle at 30°. Sensitivity of drag coefficient toward each of the parameters is established in this paper. Originality/value: The paper, in addition to verifying the importance of aspect ratio, has also established the tip angle, diameter ratio and rear angle of the torpedo as important geometric aspects that could be tuned to improve its terminal velocity.",
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Numerical analyses for improved terminal velocity of deep water torpedo anchor. / Soh, Boonping; Pao, William; Chen, Xiaohui.

In: International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 27, No. 2, 21.03.2017, p. 428-443.

Research output: Contribution to journalArticle

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AU - Pao, William

AU - Chen, Xiaohui

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