Going into this project, we did not know much about wind tunnels, much less how to build one. If I was to make it for a science expo what would a possible purpose of building it be other than observing the drag of different articles, Nice job jamesabt007,However I would like to know how long the Dry Ice lasts.Regards, Stephen, Reply I hope I can visit or even work there one day too! 2 years ago. The main objective of building this wind tunnel was to be able to educate people about the implications of aerodynamic testing and inspire youth's interest in STEM. a minute ago. Duct Tape 6. Then the rope is thrown over the tunnel and the plastic pulled over the tunnel using the rope. The… Researchers use wind tunnels to learn more about how an aircraft will fly. Since the project was sponsored by our high school AP Physics teacher, we brought in the wind tunnel to show students. The intake additionally functions to speed up the air incoming due to the conservation of energy, where A1V1=A2V2 (A=Cross sectional area, V=Velocity of fluid). Using simple wire coat hangers, he was able to unbend them such that they took the shape of a hoop with a small loop on the top. Very good job!! I also had the opportunity to display my tunnel when my school's robotics team had the chance to run a Junior FLL Expo. $100 and uses a computer fan motor to move air past small models. To see more of the videos that were not provided on this guide, click here for the whole playlist of the filmed tests. Text Only Site I am currently an engineering student at UCLA and look forward to sharing more projects with the Instructables community…, http://www.seriouswheels.com/pics-2005/2005-Pagani-Zonda-F-n-Wind-Tunnel-1600x1200.jpg, http://airfactsjournal.com/files/2012/09/wind-tunnel.jpg, http://www.efluids.com/efluids/gallery/gallery_pages/HW019/Werle_19.jpg, http://www.cdn.sciencebuddies.org/Files/503/9/wind-tunnel_F.jpg, https://www.grc.nasa.gov/www/k-12/airplane/Images/tuntest.jpg, http://3.bp.blogspot.com/-9omxPSGsnr4/UM9nx3kN0sI/AAAAAAAAT8M/iRJpWE3bkiA/s1600/open-circuit-wind-tunnel.jpg, http://www.grc.nasa.gov/WWW/k-12/airplane/Images/tunpart.gif. Weirdly enough, when I mentioned that I write Instructables for my Olin Candidates weekend, one of my interviewers mentioned that she was a friend of yours. A chicken tunnel! With this, the top of another cup is sliced off and added to the original set up inverted such that a sealed compartment can be achieved. I am aiming to achieve a windspeed approximately at 10-20 m/s. Two leftover Lexan sheets were cut to the same width as the long pieces to act as a clear bridge between the sides. When I was making my flow straightener, I recall learning from feedback on my last guide that the dimensions of the honeycomb array of flow straighteners should fall within a certain range of values dictated by an equation known as the Reynolds Number (wiki link). The smoke visualization proved to be ineffective with a glass jar since the ice would easily freeze the container and we feared it shattering the whole jar. The design of a wind tunnel is very simple, consisting of four main parts: an intake section, a testing section, a diffuser, and a fan (or array of fans). Would I need some thing like an industrial fan such as this: http://www.bunnings.com.au/dynabreeze-60cm-blue-industrial-drum-fan_p4440780Or should i make some thing like this so I can control the fan speed with PWM :https://www.instructables.com/id/PC-Box-Fan/So for a 120mm fan, the flow rate is usually between 50~75 CFM. + Non-Flash Version A wind tunnel consists of a tubular passage with the object under test mounted in the middle. If you are expecting high winds, or when it is time to get additional plastic covers in place for colder temperatures, you will want to secure the cover. I would recommend it over using incense or a fog machine as of now due to the dangers involved with the machine and the dizziness induced by the smoke. Pull plastic over the tunnel. We ran many different types of test in our tunnel, ranging from cars and planes to sponges and balls. The second iteration of the wind tunnel test section was far superior than the second one. This step may even not necessary if you feel that it will not matter since the effect of not having it is negligible. Although at HW scale, it might be hard to see how the smoke is moving, since it's hard to see at 1/18 scale. Although this is not a physical step to making the wind tunnel, experimentation is essential to any engineering process. 5 days but I used plywood, and plastered and spray-painted it. and operation of their wind tunnels. Oh cool! Some plastic wrap was added so that the volume of the container would be smaller, allowing for the smoke formed through the reaction between dry ice and hot water to flow through the tube easier and not get stuck in the vessel. Although this Instructable may outline the key elements to my tunnel, it leaves plenty of room to experiment with various designs that are tailored to a project's specific needs. [5] Well the physics behind it are based off of the work of Daniel Bernoulli, a Swiss physicist. A really good trail of smoke can be created from the dry ice + hot water combo with the drawback of having to replace the solution with new ice and water after a certain time. The biggest aspect of this project is the parts required in order to build the apparatus. the areas of math and science. Very clever and brilliant idea. Setting Up The Tunnel . The integration of lights within the tunnel were added along with a black construction paper backdrop to optimize visualization of the smoke. Due to high cost of electricity many people are looking for ways to reduce their monthly utility bill, … I do not think I would be able to jump directly from the second iteration of the test section without learning from what worked and did not in the first iteration. Complete plans for the tunnel can be downloaded for free from the web page. This was a relatively simple design and cheap. 1. Experiment!. "The true method of knowledge is experiment" - William Blake Towards the end of my junior year, my physics teacher challenged the class to work on a final project that would encompass all that we have learned over the year. In these sequence of images, we experimented with three things, the flow visualization tool, the unrestricted fans with the baffles gone, and the construction paper cone that eliminated the dead space and turbulence of the intake. We were one of 120 exhibitors at the Faire, the first of it's kind at San Diego but surely not the only one ever. But it will be adequate for finding the CP location on a rocket. on Introduction. + Freedom of Information Act A wind tunnel can be used to test airplanes, automobiles, or anything that you want to see how well it passes through the air. Aviation High School Wind Tunnel Here is a wind tunnel design that was developed at NASA Glenn during the Centennial of Flight Celebration in 2003. Make a cardboard sleeve with the same cross- section as the tunnel, and pack it with 2" pieces of drinking straws — this part goes faster with a small- fingered helper. Meeting him was the highlight of our day. NASA uses wind tunnels to test scale models of aircraft and spacecraft. Reply 3D Warehouse is adding a new feature for verified companies like yours. Did you make this project? This site is dedicated to helping you build your very own wind tunnel. for the tunnel can be downloaded for free from the web page. Before I worked at Instructables, I worked at the Fluid Mechanics Lab at the NASA Ames Research Center, operating huge wind tunnels all day. + With the dimensions of the given straws that I bought and some research, I was able to determine that I needed roughly have a fan that would be able to reach 5m/s (11.2 mph). 4 years ago. A simple way to do this is to secure a rope close to the edge of the poly at each end of the tunnel by placing an object such as a tennis ball under the plastic and tying the rope around it through the plastic. According to the website that provides great animations for each part of the wind tunnel (the diffuser one available here), the speeds are slowed down such that the fans do not have to run as fast which results in a cheaper operation of the fans. If I remember correctly, we were able to hit a range of speeds from 5m/s to 13m/s. TunnelSys: (245KB) Using the TunnelSys applet, students learn about the process of wind tunnel testing. Therefore, it was spray painted with a black and gold color scheme (our school's colors) and a red top for cautionary purposes. Slower fan speeds results in less power output by the motors which in turn results in less usage of a power source and more money saved. This has inspired me to make one as well.However, I am really new to the concept of aerodynamics and really need some guidance for my university project.The size of the testing section needs to be 60cm x 60cm (or 24" x 24"). The Kodo Kids Wind Tunnel was specifically designed for children to experiment with and learn about the movement of air. A small fan can be used to generate the wind. As with most well-designed engineering systems, all these components come together to accomplish the task of helping one visualize and understand the aerodynamic properties of various objects and designs. Photo Credits: #2: http://www.grc.nasa.gov/WWW/k-12/airplane/Images/tunpart.gif. This led to development in using Styrofoam cups which are insulators and less likely to lose the cold due to conduction. wind tunnel design that was developed at NASA Glenn during the If you have any specific questions, please contact me and I will be glad to help out in any way. How to Secure Row Covers on Low Tunnels. Now how does a wind tunnel work? All of these links will take you PVC High Tunnel. Put simply, the array of straws allow for the turbulent air to flow into the wind tunnel smoothly, achieving what is known as laminar flow (smooth flow). The wind tunnel moves air around an object, making it seem as if the object is really flying. This provides the foundation of wind tunnels by showing how if you decrease the cross sectional area, your speed subsequently increases. This document provides design drawings and materials lists for the DIY wind tunnel used in Lectures 9 and 10 of “Do it Yourself Engineering,” taught by Professor Stephen Ressler and … + NASA Privacy Statement, Disclaimer, This opportunity was presented when I learned about MakerFaire from searching local science fairs. Very well done. A cone made from construction paper was also prototyped and added to the fan because on the intake side of the fan, there was an area of dead space where the overall flow could be disrupted. Layer upon layer, I slowly glued the straws together with Elmers glue and eventually resulted in an array that looked beautiful. There is still room for improvements and perfection is hard to obtain. Save Share. this project is summarized below: Here is a It would be great to see what a real MakerFaire, such as the one in San Francisco, is like. I'm very impressed with your project and that you were able to use so many recycled materials and get good results! Photo Credits: #1: http://www.seriouswheels.com/pics-2005/2005-Pagani-Zonda-F-n-Wind-Tunnel-1600x1200.jpg #2: http://airfactsjournal.com/files/2012/09/wind-tunnel.jpg #3: http://www.efluids.com/efluids/gallery/gallery_pages/HW019/Werle_19.jpg #4: http://www.cdn.sciencebuddies.org/Files/503/9/wind-tunnel_F.jpg #5: https://www.grc.nasa.gov/www/k-12/airplane/Images/tuntest.jpg #6: http://3.bp.blogspot.com/-9omxPSGsnr4/UM9nx3kN0sI/AAAAAAAAT8M/iRJpWE3bkiA/s1600/open-circuit-wind-tunnel.jpg. Learn more Get new content delivered directly to your inbox. This was glued together instead of taped to add a more professional look to the whole attachment. This exhibit was timed such that it would be right before students learned about the basics of aerodynamics and drag. Hello!Current senior in high school looking to make a closed wind tunnel for a project. Basically if the thickness of a fluid is too low compared to the flow speed the flow will become turbulent. Thank you to my partners Ian Kelley and Ned Anderson for helping make this build possible and to Jonathon Boyle and Pranav Santan for assistance and guidance. **This is my version of the BOM (Bill of Materials) & tools. As a result, the overall speed of the air across the test section is increased by a certain factor. To have the wind blow evenly through the tunnel, a diffuser is placed in front of the fan. About: In my free time, I enjoy building/modifying/dismantling anything I can get my hands on. My low tunnel is finished, and it only cost me $14 for the PVC conduit and $32 for the clear plastic cover – under $50 for a 5 x 35 ft bed! After much research and understanding the much appreciated feedback from my previous guide, I was able to design a more adequate tunnel. Working on this project has definitely been one of the best things that I have ever experienced. When we constructed our high tunnel, it was created similarly, made mainly out of … A metal heating duct forms the tunnel. This post is about the tinkering process we're on to build and refine our wind tube. GO STEM!!! We had the choice to learn something new, hone a specific discipline, or develop a method to teach the class about a specific subject. I hope to see future events grow in both exhibitors and visitors. I have tried many variations of material (incense, fog machine, dry ice, etc) and vessel (glass, Styrofoam, plastic, etc) with none of them being close to perfect. + Inspector General Hotline While researching about the way other wind tunnels are designed, we encountered that many of the tunnels had intakes that similar to a bell shape or like the profile of speakers. + The President's Management Agenda In my mind, I knew that I wanted to find a project that encompassed all three of these criteria. There hundreds of elementary school kids and they all enjoyed seeing the tunnel. A wind tunnel is a chamber through which high-speed air is passed. Essentially, the equation goes as such: "Re= ρvD/μ, where ρ is the density of the fluid (air in our case), v is the velocity, D is the diameter of the pipe the fluid is going through, and µ is the dynamic viscosity" (Instructables user Hawkeye_bkj [Thank you for the help]). I am doing this project because I need to test a few of my designs...It is missing a bit of needed information like the angles of the cut parts and the lengths of parts of it, 6 years ago Cool, what speed you can get in the test section? Apart from vertical wind tunnels and others used for specific tests (e.g. Vision in Aeronautics Report - Word Document, Barberton Incoming air from the test section enters the part of the wind tunnel known as the diffuser. I ended up going through I would say 8 or more packets of drinking straws. pressurised or cryogenic wind tunnels), most of the LSWTs can be categorised into two basic groups: open and closed circuit. Whether you're young, old, student, or teacher, building your own wind tunnel is easier than ever. Over 100 years, we based the design increased speed by several mph, and most critters speeding... In relation to the whole playlist of the filmed tests around an object, making the wind tunnel be. 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