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GE60 20C

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by

keroro gunzo

on 13 January 2015

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Transcript of GE60 20C

Aerodynamic of Sepak Takraw Ball Using Computational Fluid Dynamic (CFD) Modeling
INTRODUCTION
Background :
sepak means "kick" in Bahasa Melayu
takraw which means "ball" or "woven ball" in Thailand language
Two teams consist of three player each using only all limbs except hand to control ball
exhange ball within 3 contacts
LITERATURE REVIEW
aerodynamic properties
lift-the force on balls which are directed perpendicular to the ball's trajectory
drag-force in the opposite direction of the ball's flight path(Kensrud & Smith)
REFERENCE
Kensrud JR and Smith LV. In situ lift measurement of sports balls. Procedia Engineering. 2011; 13: 278-83.
Barber S, Haake SJ and Carré M. Using CFD to understand the effects of seam geometry on soccer ball aerodynamics. The Engineering of Sport 6. 2006: 127-32.
Haake S, Goodwill S and Carre M. A new measure of roughness for defining the aerodynamic performance of sports balls. Proceedings of the Institution of Mechanical Engineers, part C: Journal of mechanical engineering science. 2007; 221: 789-806.
Seo K, Shibata M. Aerodynamic characteristics of a sepak takraw ball on its face orientation. The Impact of technology on Sport III 2009: 372-82.
OBJECTIVES
To investigate the aerodynamic properties of Sepak Takraw ball such as drag and lift coefficient using Computational Fluid Dynamic(CFD) analysis
To conduct wind tunnel experiment to obtain aerodynamic properties such as drag and lift
To compare and analyse different aerodynamic results for different orientations of Sepak Takraw ball model
To compare and analyse the CFD analysis results and wind tunnel results.

METHODOLOGY
CFD simulation:
different orientation and speed
flow visualization, drag and lift result
trajectory simulation

Wind tunnel experiment:
sepak takraw ball mounted with force sensor
drag, lift and side force recorded

PROGRESS
NAME :
ABDUL SYAKIR BIN ABDUL MUBIN
MATRIC NO :
KGA 130012
SUPERVISOR :
NORHAFIZAN AHMAD
DR AZUDDIN MAMAT
GANTT CHART
12/13-2/13
LITERATURE REVIEW
Literature study from existing aerodynamic of sports balls with relation of sepak takraw ball
CFD ANALYSIS
Run CFD analysis of the sepak takraw ball for different position and speed
CAD MODEL
Set up the geometrical and material properties of sepak takraw ball
WIND TUNNEL
Run wind tunnel sepak takraw model for different position
5/14-8/14
ANALYSIS & FINAL SUBMISSION
9/12-12/13
Compiling data analysis acquire from all CFD analysis and final documentation
Dissertation writing
Dissertation submission
10/13-12/12
2/14-5/14
CAD Model
Preliminary CFD analysis
PROBLEM STATEMENT
factors affecting the flight trajectory of sepak takraw ball
Lack of information on aerodynamic parameter of sepak takraw ball in literature

factors affecting aerodynamic
geometry(Barber, Haake & Carre)
velocity(Haake, Goodwill & Carre)
orientation( Seo & Shibata)
SCOPE
focus on different orientation
speed velocity range between 5m/s to 30m/s
CFD analysis focus on static ball only
Ball Description:
The modern takraw ball is made by interwoven plastic strip hoop intertwine into a spherical shape
Traditional ball made of rattan
These interwoven hoops form 12 pentagon holes and 30 intersections for modern ball
FLOW CHART ACTIVITIES
Full transcript