Showing the Airflow in a Wind Tunnel
Areas of Science |
Aerodynamics & Hydrodynamics |
Difficulty | |
Time Required | Long (2-4 weeks) |
*Note:
For this science project you will need to develop your own experimental procedure. Use the information in the summary tab as a starting place. If you would like to discuss your ideas or need help troubleshooting, use the Ask An Expert forum. Our Experts won't do the work for you, but they will make suggestions and offer guidance if you come to them with specific questions.
If you want a Project Idea with full instructions, please pick one without an asterisk (*) at the end of the title.
If you want a Project Idea with full instructions, please pick one without an asterisk (*) at the end of the title.
Abstract
A technique often used in wind tunnels is to introduce smoke in front of the airfoil that is being tested. The smoke comes from regularly-spaced point sources, and the wind flow in the tunnel spreads it out into parallel lines, called streamlines. The streamlines make it possible to visualize the airflow over the airfoil. When the lines continue smoothly over and past the airflow, they show that the flow remains laminar, and that the airfoil is creating very little drag. When the streamlines show more chaotic, turbulent flow, they indicate that the airfoil is creating more drag. You can do something similar with a wind tunnel by stretching thin strings across the flow path, above and below your airfoil test zone. Clip them in place so you can move them up and down to fit different airfoil shapes. Attach a ribbon (about 25 cm long) to each string. Use a stick attached to your airfoil to hold it while you place it in the flow path, between the ribbons. The ribbons will act like the smoke streamlines, so that you can visualize whether the flow over your airfoil is turbulent or laminar. Try different airfoil shapes and measure which have the most laminar and the most turbulent flow. (Parker, 2005, 18-19)Bibliography
Parker, S., 2005. The Science of Air: Projects and Experiments with Air and Flight, Chicago, IL: Heinemann Library.Share your story with Science Buddies!

Cite This Page
General citation information is provided here. Be sure to check the formatting, including capitalization, for the method you are using and update your citation, as needed.MLA Style
Science Buddies Staff.
"Showing the Airflow in a Wind Tunnel." Science Buddies,
20 Nov. 2020,
https://www.sciencebuddies.org/science-fair-projects/project-ideas/Aero_p026/aerodynamics-hydrodynamics/showing-the-airflow-in-a-wind-tunnel.
Accessed 23 Apr. 2021.
APA Style
Science Buddies Staff.
(2020, November 20).
Showing the Airflow in a Wind Tunnel.
Retrieved from
https://www.sciencebuddies.org/science-fair-projects/project-ideas/Aero_p026/aerodynamics-hydrodynamics/showing-the-airflow-in-a-wind-tunnel
Last edit date: 2020-11-20
Experimental Procedure
For this science project you will need to develop your own experimental procedure. Use the information in the summary tab as a starting place. If you would like to discuss your ideas or need help troubleshooting, use the Ask An Expert forum. Our Experts won't do the work for you, but they will make suggestions and offer guidance if you come to them with specific questions.If you want a Project Idea with full instructions, please pick one without an asterisk (*) at the end of the title.
Share your story with Science Buddies!

Ask an Expert
The Ask an Expert Forum is intended to be a place where students can go to find answers to science questions that they have been unable to find using other resources. If you have specific questions about your science fair project or science fair, our team of volunteer scientists can help. Our Experts won't do the work for you, but they will make suggestions, offer guidance, and help you troubleshoot.Ask an Expert
Related Links
If you like this project, you might enjoy exploring these related careers:
Log in to add favorite
More Menu
Career Profile
Humans have always longed to fly and to make other things fly, both through the air and into outer space—aerospace engineers are the people that make those dreams come true. They design, build, and test vehicles like airplanes, helicopters, balloons, rockets, missiles, satellites, and spacecraft.
Log in to add favorite
More Menu
Career Profile
Aviation inspectors are critical to ensuring that aircraft are safe to fly. They conduct pre-flight inspections to make sure an aircraft is safe. They also inspect the work of aircraft mechanics, and keep detailed records of work done to maintain or repair an aircraft. As problems are identified, they may make changes to maintenance schedules, and may be called upon to investigate air accidents.
Log in to add favorite
More Menu
Career Profile
Aerospace engineering and operations technicians are essential to the development of new aircraft and space vehicles. They build, test, and maintain parts for air and spacecraft, and assemble, test, and maintain the vehicles as well. They are key members of a flight readiness team, preparing space vehicles for launch in clean rooms, and on the launch pad. They also help troubleshoot launch or flight failures by testing suspect parts.
Looking for more science fun?
Try one of our science activities for quick, anytime science explorations. The perfect thing to liven up a rainy day, school vacation, or moment of boredom.
Find an ActivityExplore Our Science Videos
Walking Water Experiment
|
Why Won't it Mix? Discover the Brazil Nut Effect
|
Slow Motion Craters - STEM Activity
|