Computational study on near wake interaction between undulation body and a D-section cylinder

Qing Xiao; Ke Sun; Hao Liu; Jianxin Hu

doi:10.1016/j.oceaneng.2010.12.017

Computational study on near wake interaction between undulation body and a D-section cylinder

Qing Xiao, Ke Sun, Hao Liu, Jianxin Hu

Naval Architecture, Ocean And Marine Engineering

Research output: Contribution to journal › Article › peer-review

54 Citations (Scopus)

Abstract

We present a numerical study on the hydrodynamic performance of undulation NACA0012 foil in the near wake of D-section cylinder. Computations are conducted using unsteady incompressible Navier–Stokes equations with a moving adaptive mesh based on laminar flow. Investigations are focused on the effect of distance ratio between foil tip and centre of cylinder (L/Dr2.0) on the thrust/drag performance of foil and cylinder at various foil undulation frequency (St). We found that, foil thrust coefficient (Ct) increases considerably with the appearance of cylinder and an optimal distance exists at which Ct reaches maxima. The maximum increment is about eleven times that of its counterpart of single foil, which is obtained at St¼0.23 and L/D¼0.5. Our results for the cylinder drag coefficient (Cd) observed the existence of optimal parametric map, combined with various gap ratios and foil frequencies. With these parameters, insertion of an undulation foil can significantly lead to the drag reduction indicating that undulating foil could work efficiently as a passive vortex control device for
cylinder drag reduction.

Original language	English
Pages (from-to)	673–683
Number of pages	11
Journal	Ocean Engineering
Volume	38
Issue number	4
Early online date	22 Jan 2011
DOIs	https://doi.org/10.1016/j.oceaneng.2010.12.017
Publication status	Published - Mar 2011

Keywords

undulation foil
cylinder drag reduction
thrust generation
vortex control
computational study
interaction
undulated body
d-section cylinder

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10.1016/j.oceaneng.2010.12.017

E Infrastructure Bid - Recurrent Costs Bid
Littlejohn, D. (Principal Investigator), Fedorov, M. (Co-investigator), Mulheran, P. (Co-investigator) & Reese, J. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/04/12 → 31/03/13
Project: Research
E Infrastructure Bid - Capital Equipment Bid
Littlejohn, D. (Principal Investigator), Fedorov, M. (Co-investigator), Mulheran, P. (Co-investigator) & Reese, J. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
20/01/12 → 31/03/12
Project: Research

ARCHIE-WeSt (UOSHPC)
Martin, R. (Manager)
University Of Strathclyde
Facility/equipment: Facility

Cite this

@article{be1a10835be94508a01eda09dd409d76,

title = "Computational study on near wake interaction between undulation body and a D-section cylinder",

abstract = "We present a numerical study on the hydrodynamic performance of undulation NACA0012 foil in the near wake of D-section cylinder. Computations are conducted using unsteady incompressible Navier–Stokes equations with a moving adaptive mesh based on laminar flow. Investigations are focused on the effect of distance ratio between foil tip and centre of cylinder (L/Dr2.0) on the thrust/drag performance of foil and cylinder at various foil undulation frequency (St). We found that, foil thrust coefficient (Ct) increases considerably with the appearance of cylinder and an optimal distance exists at which Ct reaches maxima. The maximum increment is about eleven times that of its counterpart of single foil, which is obtained at St¼0.23 and L/D¼0.5. Our results for the cylinder drag coefficient (Cd) observed the existence of optimal parametric map, combined with various gap ratios and foil frequencies. With these parameters, insertion of an undulation foil can significantly lead to the drag reduction indicating that undulating foil could work efficiently as a passive vortex control device for cylinder drag reduction.",

keywords = "undulation foil, cylinder drag reduction, thrust generation, vortex control, computational study, interaction, undulated body, d-section cylinder",

author = "Qing Xiao and Ke Sun and Hao Liu and Jianxin Hu",

year = "2011",

month = mar,

doi = "10.1016/j.oceaneng.2010.12.017",

language = "English",

volume = "38",

pages = "673–683",

journal = "Ocean Engineering",

issn = "0029-8018",

publisher = "Elsevier B.V.",

number = "4",

}

TY - JOUR

T1 - Computational study on near wake interaction between undulation body and a D-section cylinder

AU - Xiao, Qing

AU - Sun, Ke

AU - Liu, Hao

AU - Hu, Jianxin

PY - 2011/3

Y1 - 2011/3

N2 - We present a numerical study on the hydrodynamic performance of undulation NACA0012 foil in the near wake of D-section cylinder. Computations are conducted using unsteady incompressible Navier–Stokes equations with a moving adaptive mesh based on laminar flow. Investigations are focused on the effect of distance ratio between foil tip and centre of cylinder (L/Dr2.0) on the thrust/drag performance of foil and cylinder at various foil undulation frequency (St). We found that, foil thrust coefficient (Ct) increases considerably with the appearance of cylinder and an optimal distance exists at which Ct reaches maxima. The maximum increment is about eleven times that of its counterpart of single foil, which is obtained at St¼0.23 and L/D¼0.5. Our results for the cylinder drag coefficient (Cd) observed the existence of optimal parametric map, combined with various gap ratios and foil frequencies. With these parameters, insertion of an undulation foil can significantly lead to the drag reduction indicating that undulating foil could work efficiently as a passive vortex control device for cylinder drag reduction.

AB - We present a numerical study on the hydrodynamic performance of undulation NACA0012 foil in the near wake of D-section cylinder. Computations are conducted using unsteady incompressible Navier–Stokes equations with a moving adaptive mesh based on laminar flow. Investigations are focused on the effect of distance ratio between foil tip and centre of cylinder (L/Dr2.0) on the thrust/drag performance of foil and cylinder at various foil undulation frequency (St). We found that, foil thrust coefficient (Ct) increases considerably with the appearance of cylinder and an optimal distance exists at which Ct reaches maxima. The maximum increment is about eleven times that of its counterpart of single foil, which is obtained at St¼0.23 and L/D¼0.5. Our results for the cylinder drag coefficient (Cd) observed the existence of optimal parametric map, combined with various gap ratios and foil frequencies. With these parameters, insertion of an undulation foil can significantly lead to the drag reduction indicating that undulating foil could work efficiently as a passive vortex control device for cylinder drag reduction.

KW - undulation foil

KW - cylinder drag reduction

KW - thrust generation

KW - vortex control

KW - computational study

KW - interaction

KW - undulated body

KW - d-section cylinder

U2 - 10.1016/j.oceaneng.2010.12.017

DO - 10.1016/j.oceaneng.2010.12.017

M3 - Article

SN - 0029-8018

VL - 38

SP - 673

EP - 683

JO - Ocean Engineering

JF - Ocean Engineering

IS - 4

ER -

Computational study on near wake interaction between undulation body and a D-section cylinder

Abstract

Keywords

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