Uploaded May 2015 | Updated September 2026, 2 weeks ago
This is the last video in my 10-video series on coding a program in MATLAB to compute, display, and save a NACA 4-digit airfoil.
IN THIS VIDEO:
We add in the code for saving the airfoil data out to a text file. Both the LE to TE and TE to LE methods are coded. A comparison between the output from this code and the data from the UIUC airfoil data site (see link below) is made to confirm that our code works the way it should.
UIUC Airfoil Data Site:
http://m-selig.ae.illinois.edu/ads/coord_database.html
IN THIS SERIES:
Part 1/10 : goo.gl/9UBgbo
Part 2/10 : goo.gl/jRRcYJ
Part 3/10 : goo.gl/rSVLHo
Part 4/10 : goo.gl/HwHB39
Part 5/10 : goo.gl/AlDne8
Part 6/10 : goo.gl/7n1QP7
Part 7/10 : goo.gl/nTGleR
Part 8/10 : goo.gl/ez247P
Part 9/10 : goo.gl/8mXYcc
Part 10/10: goo.gl/ovBlbW
If you've made it this far, thanks for watching! I hope you enjoyed it. Let me know if you have any questions or comments.
This is the last video in my 10-video series on coding a program in MATLAB to compute, display, and save a NACA 4-digit airfoil.
IN THIS VIDEO:
We add in the code for saving the airfoil data out to a text file. Both the LE to TE and TE to LE methods are coded. A comparison between the output from this code and the data from the UIUC airfoil data site (see link below) is made to confirm that our code works the way it should.
UIUC Airfoil Data Site:
http://m-selig.ae.illinois.edu/ads/coord_database.html
IN THIS SERIES:
Part 1/10 : goo.gl/9UBgbo
Part 2/10 : goo.gl/jRRcYJ
Part 3/10 : goo.gl/rSVLHo
Part 4/10 : goo.gl/HwHB39
Part 5/10 : goo.gl/AlDne8
Part 6/10 : goo.gl/7n1QP7
Part 7/10 : goo.gl/nTGleR
Part 8/10 : goo.gl/ez247P
Part 9/10 : goo.gl/8mXYcc
Part 10/10: goo.gl/ovBlbW
If you've made it this far, thanks for watching! I hope you enjoyed it. Let me know if you have any questions or comments.


![Explained: Afterburners
What are afterburners, and how do they work? In this video, Ill go into some detail on how different parts of the afterburner work, and why they are designed that way.
NOTES
► I always speak pretty quickly in my videos, so if you need to take it slower, you have the option of slowing down the video speed to 0.75x or even 0.5x the normal speed (I realize that I speak particularly fast in this video).
► Apparently since YouTube got rid of annotations, I have no way of letting you know in the video that I made a mistake, so Ill just have to hope that you read my video descriptions.
► At around 4:49, I say that droplet evaporation times are higher for higher temperatures. I meant to say that droplet evaporation times are higher for LOWER temperatures, which is why the cold bypass flow takes longer to evaporate droplets. Another way of saying this is that for the same droplet diameter, it will take longer to evaporate in a colder flow than in a hotter flow.
RELEVANT VIDEOS
→ In a Nutshell: Afterburners
https://goo.gl/fCxCqs
→ Area-Mach Number Relation
https://goo.gl/yNuu2t
REFERENCES
► Afterburners in The Aerothermodynamics of Aircraft Gas Turbine Engines, Zukoski
► Mechanics and Thermodynamics of Propulsion, Hill and Peterson
► Aerothermodynamics of Gas Turbine and Rocket Propulsion, Oates
► Aircraft Propulsion, Farokhi
► Aerospace Propulsion Systems, Ward
► Fundamentals of Jet Propulsion with Applications, Flack
THUMBNAIL PHOTO CREDIT
By United States Navy, Mass Communications Specialist 2nd Class Michael D. Cole [Public domain], via Wikimedia Commons Explained: Afterburners](https://i.ytimg.com/vi/mH3BBUpzj9c/mqdefault.jpg)

![Explained: Normal Vector [CFD]
This is a video describing the general technique of finding a vector normal to another vector, with an emphasis on its relation to CFD codes. Explained: Normal Vector [CFD]](https://i.ytimg.com/vi/mixm2y8ukTg/mqdefault.jpg)
![Explained: Line And Scatter Plot [Excel]
This video explains how to display both line data and scatter data on the same plot in Excel. Explained: Line And Scatter Plot [Excel]](https://i.ytimg.com/vi/nFylutP84ro/mqdefault.jpg)



![Explained: Converging-Diverging Nozzle
Why do rocket engines look the way they do? In this video, Ill be explaining what a converging-diverging (CD) nozzle is, and how the flow changes as it passes through it.
See the Relevant Videos section below for some more in-depth videos on each of the flow states, including examples!
NOTES
► At 11:28, I say so far, we have subsonic flow throughout the nozzle for all these cases. I meant to say that we have isentropic flow throughout the nozzle for all these cases.
RELEVANT VIDEOS
Pressure Ratio Delineations
https://goo.gl/VQnH1n
Normal Shock in the Nozzle Calculations
https://www.youtube.com/watch?v=b0wvwkKqoVw
Overexpanded Flow Calculations
Coming soon!
Underexpanded Flow Calculations
Coming soon!
Area-Mach Number Relation
https://goo.gl/j4FwQX
Sonic State (Critical, Star)
https://goo.gl/vhjESy
Normal Shock Relations
https://goo.gl/bhw6Ln
Isentropic Relations
https://goo.gl/mkdNHd
Stagnation Relations
https://goo.gl/hBY2AV
RELEVANT BLOG POST
http://www.joshtheengineer.com/2016/11/16/solving-the-area-mach-number-relation/
REFERENCES
► Notes by Matt MacLean
► Modern Compressible Flow, Anderson
Amazon Link: https://goo.gl/9B7F8H
► Elements of Gasdynamics, Liepmann and Roshko
Amazon Link: https://goo.gl/brfScu
► Gas Dynamics, Zucrow and Hoffman
Amazon Link: https://goo.gl/mwLk8L
THUMBNAIL IMAGE
By NASA (NIX #: MSFC-0201422. [1], Alt. URL.) [Public domain], via Wikimedia Commons Explained: Converging-Diverging Nozzle](https://i.ytimg.com/vi/p8e8A3sdVOg/mqdefault.jpg)
