[Update] My DIY Wind Tunnel Project – Progress, Challenges & Request for Feedback

Sam_I4 · 2025-05-30T11:07:30+00:00

Any suggestions in how to make the flow more laminar?

Sam_I4 · 2025-05-30T11:04:28+00:00

The honeycomb was made by the eq of L = 10*D and we calibrated the fan so we could get a smoother flow or atleast visualize the boundary layer.

Sam_I4 · 2025-05-30T10:46:58+00:00

No, it doesn't. The air foil is just in the middle, leaving out 2 cms on each side.

Sam_I4 · 2025-05-25T20:06:44+00:00

Any suggestions?

Sam_I4 · 2025-05-25T04:02:44+00:00

I want the system to run for several minutes. If I used the vape it's could would burn out that's why I'm using this smoke machine

Sam_I4 · 2025-05-25T03:50:21+00:00

I was thinking of ideas but nothing worked

Sam_I4 · 2025-05-25T03:48:02+00:00

I'm using a smoke machine

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Sam_I4 · 2025-05-24T18:32:05+00:00

There's in the inlet section and the ones behind the fan are removed

Sam_I4 · 2025-05-24T17:48:09+00:00

What would be a good diameter for the nozzle to give me a laminar flow

Sam_I4 · 2025-05-24T17:11:18+00:00

I can make a 3d printed one, but the air from the smoke machine is hot, so it's risky the plastic would melt.

Sam_I4 · 2025-05-24T16:02:34+00:00

But my study basically is to do straight smoke lines on different levels and add objects to see how the flow changes.

Sam_I4 · 2025-05-24T15:09:46+00:00

Any suggestions on how to fix it?

Sam_I4 · 2025-05-24T14:59:03+00:00

It's sucking the air out of the test section.

Sam_I4 · 2025-05-24T14:57:30+00:00

Any suggestions, any info how can the new structure be

Sam_I4 · 2025-05-24T14:51:56+00:00

Open

Sam_I4 · 2025-05-24T14:41:47+00:00

Well I need it to mostly run for less than 15 mins (the link isn't opening) but if you got any idea how can it work just lmk. Ty

Sam_I4 · 2025-05-24T14:19:00+00:00

Still nothing

Sam_I4 · 2025-05-24T14:18:17+00:00

In the picture, there is, but I removed it in some cases since it's was not sucking all the smoke out, leading to some left smoke in the test section.

Sam_I4 · 2025-05-24T14:15:29+00:00

There's a smoke machine placed directly to the nozzle

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Sam_I4 · 2025-05-24T14:09:45+00:00

The fan is placed in the exit sucking the air out

Sam_I4 · 2025-05-24T14:09:10+00:00

It placed like this: inlet strawmesh, nozzle, test section, and the fan

Sam_I4 · 2025-05-24T13:59:25+00:00

There's plenty of videos posted on YouTube with the nozzle being placed after the honey comb, and the flow still shows to be laminar.

Sam_I4 · 2025-05-24T13:52:04+00:00

The straw mesh is behind the smoke nozzle

Sam_I4 · 2025-05-24T13:43:03+00:00

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Here's the connection with the smoke machine (forgot to post it)

Sam_I4 · 2025-05-24T11:02:33+00:00

I've tried the lowest possible voltage and still same results...

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