Thread: tuft testing
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Old 09-28-2010, 03:19 PM   #8 (permalink)
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I was reading about the Nissan Leaf headlights acting as splitters and small turbulators in other threads. A week or two ago I saw a blade from a large wind generator being hauled on the back of a truck It had turbulators about the same shape every foot or so about a 1/3rd of the way along the top edge of the wing surface. I did some more tuft testing on my wand. I noticed that on the top of the fender I was getting pretty laminar flow over the top of the fender pointing toward the rear view mirror.

I made three 1" high fins (cut from some 3/16" balsa wood that I had laying around) to act as turbulators and taped them on (about 15 degrees from the air flow) where I thought that the flow would intersect the mirror. I noticed that there was less air noise with the window open and that the air behind them had reduced velocity.

I need to finish my front of the wheel air deflectors and make another 20 wedges. I am going to put some in front of the wipers and at the top of the windshield.
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