Wind Tunnel Data Analysis and Testing Considerations

Рет қаралды 4,761

Күн бұрын

This is the last video in our 3 part series on wind tunnel testing. In this video, we discuss what typical plots of wind tunnel data might look like and how to extract relevant information such as stability derivatives and performance data from the results. In addition, we present some things to consider when building a wind tunnel model or executing a wind tunnel test.
Topics and timestamps:
0:00 - Introduction
7:23 - Coefficient of Lift, CL
35:13 - Coefficient of Drag, CD
46:17 - Coefficient of Sideforce, CY
53:40 - Coefficient of pitching moment, CM
1:09:10 - Coefficient of rolling moment, Cl
1:18:26 - Coefficient of yawing moment, CN
1:25:28 - Aerodynamic forces/moments in body frame
1:37:27 - Model construction considerations
1:41:28 - Test execution considerations
Lecture notes and code can be downloaded from github.com/clum/KZfaq/tree/...
All Wind Tunnel videos in a single playlist ( • Wind Tunnel Testing )
All Flight Mechanics videos in a single playlist ( • Flight Mechanics )
#FlightMechanics #WindTunnelTesting
You can support this channel via Patreon at / christopherwlum or by clicking on the ‘Thanks’ button underneath the video. Thank you for your help!

Пікірлер: 39

@ChristopherLum 3 жыл бұрын

In case it is helpful, here are all the Wind Tunnel videos in a single playlist kzfaq.info/sun/PLxdnSsBqCrrEbjML0UneRVLn8YDoxql-i. All the Flight Mechanics videos in a single playlist kzfaq.info/sun/PLxdnSsBqCrrEx3A6W94sQGClk6Q4YCg-h. You can support this channel via Patreon at www.patreon.com/christopherwlum. Please let me know what you think in the comments. Thanks for watching!

@WalkingDeaDJ 2 ай бұрын

Jason-AE512: This video offers a thorough analysis of how wind tunnel data is interpreted and utilized in testing. The detailed discussion on interpreting aerodynamic forces and moments and the considerations for test planning are particularly valuable for researchers and practitioners.

@zaneyosif 2 ай бұрын

AE512: Great indepth explanation on all the coefficients.

@SayedTorak 3 ай бұрын

AE 512: Great explanation Prof. Lum. I did not know wind tunnel tests could be so expensive.

@reesetaylor3506 3 ай бұрын

AE 512: Very helpful video, I have always been pretty confused on how to interpret changes to the aero coefficients in terms of physcial orientations/actions of the aircraft and this made it super intuitive. Thanks!

@chayweaver.2995 Ай бұрын

AE512: I liked getting insight here on what considerations need to be accounted for when doing wind tunnel testing

@BenDurante 3 жыл бұрын

The breakdown of the coefficients was extremely helpful, and the list of considerations provided at the end is invaluable! I feel like the final lists are a lot of considerations you don't learn until you've been through the process a couple times and the heads up is very much appreciated. Thank you very much for the video!

@ChristopherLum 3 жыл бұрын

Ben, great to hear from you again. I'm glad this was useful. Out of curiosity, are you involved with wind tunnel testing or aircraft performance in some fashion?

@BenDurante 3 жыл бұрын

Aircraft performance to an extent. I'm currently a graduate student focusing on fixed-wing aircraft control. Not having had an aerospace background in undergrad I'm working to build that foundational knowledge.

@ChristopherLum 3 жыл бұрын

@@BenDurante Sounds good, I assume you've found the flight mechanics playlist (kzfaq.info/sun/PLxdnSsBqCrrEx3A6W94sQGClk6Q4YCg-h). You've left some very insightful feedback/comments and I'd love to get your opinion on some of the other videos in the series. I hope to hear from you at another video!

@BenDurante 3 жыл бұрын

@@ChristopherLum Yes, the flight mechanics playlist has been a wonderful resources, thank you for compiling it. I'll be sure to comment as I continue reviewing the content. I look forward to your future videos in this series!

@aimeepak717 2 ай бұрын

AE512: Great info on the coefficients!

@Kumky605 5 ай бұрын

AA516: Forgot to comment on this when I watched it the first time but great lecture, cool to hear about what a negative drag could really mean

@Colin_Baxter_UW 5 ай бұрын

AA516: Very interesting- I had never considered a motor-on test in a wind tunnel.

@sethwhittington28 2 жыл бұрын

AE512: Great intro to the considerations to make when designing a model for wind tunnel testing!

@davidtelgen8114 3 ай бұрын

AE 512: I bet getting the powered models to work just right in the wind tunnel and not misfire is a joy!

@edwardmau5877 2 ай бұрын

AE 512 thank you for the time stamps.

@manitaregmi6932 2 жыл бұрын

AA 516 - I watched all the wind tunnel series last year during my junior year and I remember being so grateful for these videos because it helped me a lot during my data analysis for lab reports.Even though we did not have to go this much in detail, it was nice knowing the background behind all of it. Thank you for the great series of wind tunnel test!

@ChristopherLum 2 жыл бұрын

Manita, awesome, I'm glad they are helpful. Out of curiosity, when you were a junior did you just watch them for fun (and how did you even discover them)? I'm mostly curious to see if these videos get visibility outside of UW classes/circles.

@manitaregmi6932 2 жыл бұрын

@@ChristopherLum Because of Pandemic our lab were virtual so we didn't get a chance to be at wind tunnel or do any testing, and I didn't have any prior experience. So I decided to do some research and your video came up first when I searched for wind tunnel test in KZfaq.

@rowellcastro2683 5 ай бұрын

AA516: 45:00 an airplane configuration with negative drag sounds amazing.

@user-hw8di2xk7f 5 ай бұрын

AA516: Celeste Yuan. We are planning to go into the wind tunnel for my capstone and rewatching this really helped me understand how we plan to post-process the data!

@rahulcorleone4222 3 жыл бұрын

I am working on a car simulation, this video is useful for me. Thanks.

@boeing797screamliner 3 жыл бұрын

AA516 - Great lecture as always!

@aidealczar6075 10 ай бұрын

Thank you so much for the extremely helpful series. Is it possible for you to share some videos relating on CTA measurements/data reduction/analysis?

@bsgove Ай бұрын

AE512: I didn't expect to get a short economic lesson too. I remember when I was doing research at SU, I considered KWT until the faculty saw what the daily rate was haha.

@rishabhjaiswal290 3 жыл бұрын

Great video!!. I go through Wind Tunnel Data Analysis and 6 DOF Dynamic Model of an Aircraft: RCAM .......in Step - 5 Step : Non-dimensional aerodynamic moment coefficients about AC in Fb............... If I compare them, RCAM used p q and r rate [roll pitch and yaw rate] coefficients about an aircraft in Aircraft Dynamic Model .............so , How one can get those coefficient values using wind tunnel test ??? I appreciate everything you've taught me .......Thank You!!!!!

@pasimiettinen2478 3 жыл бұрын

Around 29mins should the red curve end point go up since if you losing negative lift it is more positive? Super good video series in any case.

@marianaavila4301 Жыл бұрын

Hello Christopher, When performing wind tunnel test, do you know if the raw data will show the stall point? or do I need data correction for that?

@chayweaver.2995 3 ай бұрын

[AE: 512] In this video you use three different terms for rolling moment (C_R, C_lambda, and C_l). What is the typical convention used?

@ChristopherLum 3 ай бұрын

Good question, nomenclature often friends on who you are talking to. Cl is pretty common and so is CR

@ras22king 2 жыл бұрын

Wonderful video ❤️❤️❤️ This video list is very helpful May I ask, about Reynolds number wind tunnel to flight extrapolation? There is no many resources regards it. It would be very helpful if you could point out which resource which I can read

@ChristopherLum 2 жыл бұрын

Hi, Thanks for reaching out. If you have questions or would like to request a video, I hope you'll consider supporting the channel via Patreon at www.patreon.com/christopherwlum or via the 'Thanks' button underneath the video. I'd love to have you as a Patron as I'm able to talk/interact personally with Patrons. Thanks for watching! -Chris