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Old 12-27-2012, 04:51 PM   #11 (permalink)
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What separation point?

Let the tuft testing begin!

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Old 12-27-2012, 07:01 PM   #12 (permalink)
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Tuft Testing Prius Part 1

Ok... ok... so I didn't get the rear of the car tufted.

My helper had a wedding to go to and we thought we'd have more time to get it done.

But we did get the upper side of the car completed. Here is a picture.

I'm going to put together some streamlines (if my computer plays nice) and submit them to you guys as well.

-Ryan
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Old 12-30-2012, 11:58 PM   #13 (permalink)
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Got a little work done today and the results may be shocking!

The flow on the back of the Prius is NOT attached.

My partner and I have the frontal and bottom of the vehicle left to tuft, but so far we have discovered some areas of interest that we will be trying to smooth the flow of:

1. A-pillar - A vortex is generated from the windshield to the side window and attaches up the A-pillar.

2. Side mirrors - standard issue here. Not sure how to correct.

3. Rear Wheel Well - Turbulence formed from wheel, not as dramatic as I would have thought.

4. C-Pillar - A vortex is generated from the side window over the C-pillar to the back windshield.

5. B-Pillar - The B-pillar has a slight eddy at the rear passenger window.

I have some videos I will be editing and posting, but here are some screen shots to give you guys a feel for what is going on.
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Old 12-31-2012, 12:23 AM   #14 (permalink)
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Interesting! Tufts are reversing direction on the hatchback glass?

Looking forward to the video (or bigger pics )
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Old 12-31-2012, 12:34 AM   #15 (permalink)
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Editing video now...

They aren't reversing on the back glass, but they were not very responsive to flow. They sat relatively motionless other than the ones close to the side which were in the C-pillar vortex I was describing earlier.

Once I get the videos up, you guys can be the judge.
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Old 12-31-2012, 11:13 AM   #16 (permalink)
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Hey guys, I'm at work and Youtube.com is banned

However, search for videos by ryannoe86. There should be three (ignore the motorcycle one ). The other two are videos for you!

Enjoy!

Ryan
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Old 12-31-2012, 11:23 AM   #17 (permalink)
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I dunno, I think the rear glass looks pretty good. If it was detached flow you'd see those tufts flying all over the place.





The side view looks really good IMO.

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Old 12-31-2012, 11:40 AM   #18 (permalink)
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i like the motorsickle one the best...noticed the reverse flow on the key fob. Hope Santa brings you some gloves--a rock or bug hit to the knuckles ain't much fun. Highway 65 through paint rock valley has some nice curves to ride when the weather is nice.

i couldn't see the rear glass well enough to be able to judge on that.
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Old 12-31-2012, 11:48 AM   #19 (permalink)
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This was an initial investigation to see where the trouble spots were. We plan to complete further testing to better understand the troubled regions.

The only attachment we observed looked to be generated from the large vortex from the side of the vehicle over the C-Pillar to the back glass. The centerline did not seem to have attached flow. Video from another Youtube user initially looked like it had attached flow, however, after analyzing our data, I believe the flow witnessed in their video is also vortex flow interacting with the rear wiper.

-Ryan
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Old 12-31-2012, 11:50 AM   #20 (permalink)
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Quote:
Originally Posted by kennybobby View Post
i like the motorsickle one the best...noticed the reverse flow on the key fob. Hope Santa brings you some gloves--a rock or bug hit to the knuckles ain't much fun. Highway 65 through paint rock valley has some nice curves to ride when the weather is nice.

i couldn't see the rear glass well enough to be able to judge on that.
Haha, it was a summer day on a great wide country road. I was testing my GoPro. You can't tell it from the wide-angle lens, but I opened the bike up to about 135 in that video... unless you are a local law officer, in which case, I was going about 50 mph.

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