A study of baseball aerodynamic drag

Alam, F, Ho, H, Yang, J, Kumar, A, Rasjidin, R, Ehsan, S, Mainuddin, G and Islam, S 2011, 'A study of baseball aerodynamic drag', in Prof Mohammad Ali (ed.) International Conference on Mechanical Engineering (ICME2011), Dhaka, Bangladesh, 18 - 20 December 2011, pp. 1-6.


Document type: Conference Paper
Collection: Conference Papers

Title A study of baseball aerodynamic drag
Author(s) Alam, F
Ho, H
Yang, J
Kumar, A
Rasjidin, R
Ehsan, S
Mainuddin, G
Islam, S
Year 2011
Conference name International Conference on Mechanical Engineering
Conference location Dhaka, Bangladesh
Conference dates 18 - 20 December 2011
Proceedings title International Conference on Mechanical Engineering (ICME2011)
Editor(s) Prof Mohammad Ali
Publisher BUET
Place of publication Dhaka, Bangladesh
Start page 1
End page 6
Total pages 6
Abstract The baseball is one of the popular games in North and South America, North Asia and some parts of Europe and Africa. It is enjoyed both by participants and spectators. The games centre piece is the spherical ball. The flight trajectory of a baseball largely depends on its aerodynamic characteristics. Despite the popularity of the game, it appears that scant information on aerodynamic force experienced by a baseball is available in the open literature. Having over 108 curved stitches, complex seams and their orientation, the airflow around the ball is believed to be significantly complex and little understood. The primary objectives of this study were to evaluate aerodynamic performances of a commercially manufactured baseball. The aerodynamic forces and moments were measured experimentally for a range of wind speeds and seam orientations. The aerodynamic forces and their non-dimensional coefficients were analysed. The results indicate that the drag coefficient of a base ball is close to other closely related balls such cricket ball. The findings also indicate that the seam orientation has profound impact on ball's aerodynamic characterisitcs.
Subjects Mechanical Engineering not elsewhere classified
Keyword(s) Baseball
drag
wind tunnel
yaw angle
flow visualisation
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