Thesis
DRAG MEASUREMENT OF SHUTTLECOCK IN FREE AIR
Washington State University
Master of Science (MS), Washington State University
01/2021
DOI:
https://doi.org/10.7273/000005464
Handle:
https://hdl.handle.net/2376/124615
Abstract
Badminton is one of the fastest sport in the world, and its main component, shuttlecock, travels at a very high speed during play. Many works have previously tried to determine the drag properties of the shuttlecock, but most of them use a wind tunnel to characterize it. This study makes use of a laser calibration system using stereo vision to track and calculate the coefficient of drag for the shuttlecock in-flight. In this work, a free air study was done which included shooting a shuttlecock through a calibrated volume and tracking the position using stereo cameras to get the drag coefficient. An instantaneous drag coefficient for the shuttlecock was obtained using the tracked position, which was different from the previously used methods.The shuttlecocks were fired at speeds from 25 m/s to 65 m/s. The drag coefficient was calculated and found to be somewhat constant between 0.5 and 0.55 for a feather shuttlecock. The drag coefficient for synthetic shuttlecock varied between 0.51 and 0.55 and was found to be decreasing with increasing speed. The values for the drag coefficient were compared against the available values in the literature.
An effort to measure the effect of the stinger on the shuttlecock was made. As the wind tunnel study uses a stinger to hold the shuttlecock in place, the effect of the stinger was studied by inserting a stinger on the shuttlecock and launching it using the pneumatic cannon. The drag coefficients for the feathered shuttlecock with the stinger was found to be similar to that without the stinger. However, for a synthetic shuttlecock, the presence of the stinger lowered the drag coefficient significantly at higher speeds.
Metrics
Details
- Title
- DRAG MEASUREMENT OF SHUTTLECOCK IN FREE AIR
- Creators
- Achyut Paudel
- Contributors
- Lloyd V. Smith (Advisor)Konstantin Matveev (Committee Member)John P. Swensen (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- School of Mechanical and Materials Engineering
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University
- Number of pages
- 80
- Identifiers
- 99900592359101842
- Language
- English
- Resource Type
- Thesis