Making a Wind Tunnel for Education - Engineering Project

  • Context: Undergrad 
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    Wind Wind tunnel
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Discussion Overview

The discussion revolves around the construction of an educational wind tunnel for a mechanical engineering project, focusing on how to visualize streamlines, lift, and drag in fluid mechanics. Participants explore various methods to demonstrate airflow and streamline patterns effectively.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant proposes using a smoke generator, such as an incense stick, to visualize streamlines in the wind tunnel.
  • Another suggests attaching tiny streamers or flags to the object within the tunnel to demonstrate airflow patterns.
  • A later reply elaborates on the idea of streamers, describing them as lightweight strips of cloth, paper, or string that can indicate airflow direction, similar to a windsock.
  • Participants discuss the need for experimentation with the fixing method of the streamers to ensure they effectively demonstrate the airflow.

Areas of Agreement / Disagreement

Participants present multiple methods for visualizing streamlines, but there is no consensus on which method is superior or most effective, leaving the discussion open-ended.

Contextual Notes

Participants have not fully explored the limitations or potential challenges of each proposed method, such as the effectiveness of smoke versus streamers in different conditions.

Who May Find This Useful

Mechanical engineering students, educators in fluid mechanics, and hobbyists interested in DIY engineering projects may find this discussion relevant.

R Power
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Hi friends
I am a mechaincal engg. student and I asked yesterday my professor of fluid mechanics that there should be a educational wind tunnel in our laboratory to understand concepts of streamlines, lift and drag better and visually. He replied me with a challenge that I should make such a thing which even can be one of my projects.
Now I can make the casing covering of transparent glass fibre, setup to hold the shape to be analysed and can attach a fan for wind and everything else but the main problem is of streamlines. How can I show them? I mean what to mix with air to show streamlines. How to show them? Can anyone help please? I have to make that thing!
Thanx in advance very much! :)
 
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You'll want a smoke generator of some sort, such as an incense stick.
 
Another way is to attach tiny streamers or flags to the object in the tunnel.
 
Another way is to attach tiny streamers or flags to the object in the tunnel
what are tiny streamers or flags. can you explain a bit more?
 
Little strips of light-weight and flexible cloth or paper or string (wool yarn is good).

They string out in the tunnel airstream like a windsock in the breeze at an airfield or a flag at the back of a ship.

A little experimentation with the fixing method
 

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