I have been following William’s posts for a while now as they are amazingly insightful and deeply technical.
Here is his fantastically easy to read explanation of duct design, and the magic number you need to aim for when working out expansion angles.
William explains; “Ducts are there to capture air from, ideally, a clean, high energy source and conduct it to the place it needs to be used (usually for cooling of some sort, or for “feeding” an engine).
Expanding the air gently is the right thing to do. Often there isn’t the space to do this realistically but here’s an example of a duct that benefitted from making space.”
All images and article content are copyright William Toet.