String 8. As with all science projects, experimentation is key. NASA uses wind tunnels to test scale models of aircraft and spacecraft. If you have any specific questions, please contact me and I will be glad to help out in any way. This ible is meant more as a guide to learn from and is meant to work in tandem to the first guide. Learn more Get new content delivered directly to your inbox. Duct Tape 6. Thanks for sharing :-) Voted! In addition to these four components, there are small parts of the tunnel that make it either more accurate or easier to gather data. This led to development in using Styrofoam cups which are insulators and less likely to lose the cold due to conduction. Contact Glenn. So my question is what kind of fan do I need? A wind tunnel is a tool used in aerodynamic research to study the effects of air moving past solid objects. Glue 5. 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! 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. I gotta say, I am pretty speechless... being able to impress one of the great members I look up to on Instructables. The biggest aspect of this project is the parts required in order to build the apparatus. If you work in, or have a strong interest in engineering, it’s a good bet that at some point you’ve seen and admired wind tunnel testing. I am making a small (desktop) wind tunnel for educational purposes, I want to have 10 fairly thick smoke-streams about 3cm apart. This clear, pivoting tube is a unique teaching tool which supports exploration and invites investigation. + The President's Management Agenda Especially since the fan I used is an old fan, the efficiency of the fan was already low. Wind tunnels are simply hollow tubes; at one end, they have powerful fans that create a flow of air inside the tunnel. Very well explained - the effort put in is clearly visible! I originally planned to enter the project into a science fair but found the qualifications too limiting and stringent. on Introduction. But it will be adequate for finding the CP location on a rocket. 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 Here is a great resources for further understanding this concept behind this pat of the wind tunnel: Link, To delve into further detail, here is a great resource provided by the American Society for Engineering Education: Link. DIY. I ended up going through I would say 8 or more packets of drinking straws. This DIY wind tunnel works the same way as most open-circuit wind tunnels do. Within a few days, it grew on a humongous, unanticipated scale. + NASA Privacy Statement, Disclaimer, There hundreds of elementary school kids and they all enjoyed seeing the tunnel. We were stunned initially when we met him, missing the opportunity to take a photo with him (sadly). I made a grid of tubes 9 tubes wide by 9 tubes high (total of 81 tubes). 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. DIY Chicken Tunnel (Step-by-Step Guide) By Anne August 5, 2016 08:33 If you don’t have space and your chickens are cooped up in small coop, or even if you need some help gardening, we propose an unusual solution. It helped better explain what factors go into the B in F=-bv. Olin is such a great school, it's definitely given you the chance to work at such cool places like Ames research facility. About: In my free time, I enjoy building/modifying/dismantling anything I can get my hands on. Then the rope is thrown over the tunnel and the plastic pulled over the tunnel using the rope. 2016. of photographs that students have taken during the construction ***Exercise safety while working with dry ice and hot water! The aesthetics of the fan was also vital to the wind tunnel as a whole since it was an integral part to the instrument as a whole. + Besides military or automotive facilities, they can often be found in museums and educational science centers, where one could test out a wing shape or even a DIY parachute! Great ideas or solutions to problems are not always obtained from the first go. 2 years ago. This array was designed to fit into the connector between the intake and the test section. Working on this project has definitely been one of the best things that I have ever experienced. Jeremy S. Cook Follow. It was exciting to see the aerodynamics of unconventional objects and verify the visualization of conventional items. Oh cool! Another opening was added to the top of the test section so that flow could be visualized from the side of the model and the top, helping further reveal the mysteries of aerodynamics. Scissors 9. I would cut the straws in thirds into roughly 7cm sections and line them up for gluing. 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). From cars, airplanes, and space-faring vehicles, to buildings, bridges, and skyscrapers, knowledge and understanding gained from wind tunnel research provides a conduit for mankind's drive for innovation. 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. Meeting him was the highlight of our day. - 1996, in which high school students built a small sub-sonic wind tunnel Apart from vertical wind tunnels and others used for specific tests (e.g. On December 7th, 2013, Ian and I demonstrated our project at San Diego's First Annual Mini MakerFaire. The straws are integral to the wind tunnel. for the tunnel can be downloaded for free from the web page. Share it with us! In my mind, I knew that I wanted to find a project that encompassed all three of these criteria. on Introduction. + Budgets, Strategic Plans and Accountability Reports Did you make this project? If I remember correctly, we were able to hit a range of speeds from 5m/s to 13m/s. out of the NASA domain, so use your browser "Back" command to return here. It is meant to be more of a guide than an item by item checklist. TunnelSys is composed of three programs that simulate the design, wind tunnel testing, and post-processing of wind tunnel data. Key attributes that went into the design of this included: The basics of this component was made from 4 pieces of foamcore, each 12" X 30" with one piece that included a hole 1/4" smaller than the 4 sides of the Lexan sheet to ensure that it would not fall in. It was also recommended that I achieve a Reynolds number around 2300. ... they provide protection from wind, hail, and most critters while speeding soil warm-up for summer crops. to use in the classroom to demonstrate aeronautical principals. Pull plastic over the tunnel. Reply. How do you recommend we get started with designing the sizes and materials? 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). 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. Some specific details may be left out intentionally to allow for a certain degree of independence and creativity. Save Share. Very clever and brilliant idea. Photo Credits: #2: The NASA Glenn Research By using as many recycled materials as possible and creatively using the money allotted (including using many coupons), we were able to successfully keep the cost of the project to under $100 USD. Making things takes a great deal of trial and error, often times resulting in more of the latter than the former. I have learned a lot from my mistakes and successes during this project. Reply Please give me some guidance.Thank you for your time and help :). Decorations were also added to add some color and life to the bland sides. The second iteration of the wind tunnel test section was far superior than the second one. I am currently an engineering student at UCLA and look forward to sharing more projects with the Instructables community…,,,,,,, Wind tunnels have been used for over 100 years. wind tunnel design that was developed at NASA Glenn during the It is all a learning curve. and Accessibility Certification, A Built off the original test section, I redid the corner panels with a proper chamfering to ensure a flush, smooth joint between the walls and the side panels. GO STEM!!! 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. For the tunnel, the opposite effect is achieved with this design, taking in a lot of air and channeling it into a directed flow to the test bed of the tunnel. Versatility is a key attribute to this design. Furthermore, I decided that the construction paper was insufficient for the background since it would easily flare up and had an odd look to it so spray paint was used to make the background. This tunnel can be built for less than We… Text Only Site July 9, 2018 October 10, 2020 by Dan, posted in Aerodynamics, Testing. Tunnels created with the top-down method are dug out below where the tunnel walls and roof were erected, and then a base slab, which serves as the tunnel floor, is created. 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. However, if thought of as a learning curve, mistakes often lead to alternate approaches to problems which eventually leads to successes. 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. It's a small school, as you know, so most people within a couple grades of each other know each other, haha. By freeing up the fan, I would ensure optimal flow without altering the fan electrically. this project is summarized below: Here is a By placing half into the tunnel, we are able to manipulate the direction of the smoke by pushing it either left or right, up or down, or a combo of both. For the intake component of the wind tunnel, we based the design of our intake on various sources and principles. of this project was to advance the students' level of understanding in It's for determining if the flow is straight and laminar or if it's all swirly and turbulent. I have no idea how to convert this to m/s and if I use 25 fans, would this mean I just need to add the CFM together?I am afraid that the industrial maybe too strong and the PC fan box may not be strong enough. We were able to conclude that the although the fan modifications helped increase the flow and speed of the flow output, it could be further refined with a longer cone and hermetically sealed fan and tunnel connector. Who was your interviewer? When we constructed our high tunnel, it was created similarly, made mainly out of … Complete plans Thank you for your kind words. I hope to see future events grow in both exhibitors and visitors. Mar 8, 2015 - For our new Family Inventors' Lab class, we have built a fun tool,which encourages the kids to tinker - see my last post for how kids play with a wind tube. It would be great to see what a real MakerFaire, such as the one in San Francisco, is like. Centennial of Flight Celebration in 2003. Therefore, it was spray painted with a black and gold color scheme (our school's colors) and a red top for cautionary purposes. Due to high cost of electricity many people are looking for ways to reduce their monthly utility bill, … For my wind tunnel, I used scrap BT-50 size tubes (each about 1 inch in diameter) to make the flow straighten-er section. Wind tunnels are a fun way for students to explore physics concepts surrounding flight, air resistance, drag and aerodynamics. Yet I would not dare take credit for such a great idea provided by the awesome Instructables community memebers who helped me out on my first guide. To see more of the videos that were not provided on this guide, click here for the whole playlist of the filmed tests. After all, form does follow function. Pencil 4. 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. A guide to improving your car’s downforce and aerodynamic performance efficiently, without wind tunnel testing or CFD analysis. I like the clever use of the straws to make your honeycomb baffle. A chicken tunnel! inexpensive wind tunnel designs that you can build. Great job! More emphasis was placed on having a working design versus having it look ascetically pleasing. I have attached my plans in as an image and as a pdf so feel free to check those out. Making the honeycomb array took quite a while. Setting Up The Tunnel . Tunnels created with the bottom-up method must be back-filled to cover over the tunnel roof and any surface that is to exist above the tunnel roof is then built or rebuilt. Before I worked at Instructables, I worked at the Fluid Mechanics Lab at the NASA Ames Research Center, operating huge wind tunnels all day. A small fan can be used to generate the wind. 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 LINK TO PART 2 - Basically if the thickness of a fluid is too low compared to the flow speed the flow will become turbulent. 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"). + Inspector General Hotline A metal heating duct forms the tunnel. 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]). Since the project was sponsored by our high school AP Physics teacher, we brought in the wind tunnel to show students. Whether you're young, old, student, or teacher, building your own wind tunnel is easier than ever. Experiment!. The wind tunnel moves air around an object, making it seem as if the object is really flying. A small wind tunnel is an effective way to test the aerodynamics of model planes. There is still room for improvements and perfection is hard to obtain. This was supplemented with 4 long pieces that formed a 45-45-90 degree triangle with the square cross section, making the shape an octagon. Most of all, thank you (the reader) for being a part of this wonderful,supportive community of doers and have a wonderful day. I'm very impressed with your project and that you were able to use so many recycled materials and get good results! 3D Warehouse is adding a new feature for verified companies like yours. 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. After our build, we published a guide on Instructables (available here). This is the first iteration of the test section that I ended up using. **This is my version of the BOM (Bill of Materials) & tools. They can be further divided into open and closed test section type. Paper 3. Since there were literally a few thousand of straws to cut, I did not bother making it terribly accurate, compensating by making the exhaust of the straw line uniform but not the intake (see image 2, the back vs image 6, the front). The main purpose of this project is to build a functional miniature DIY wind tunnel to be used in physics classrooms and laboratories. Although wind tunnels are not as prevalent as other high precision instruments, they have huge implications on the everyday lives of everyone and everything on Earth and beyond. 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