Archived posting to the Leica Users Group, 2018/05/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Very different Jim!The compromises needed are very different. Getting rid of
the tunnel wall boundary layer before the model is critical, as is having
rotating wheels and preferably simulating the ground moving under the car.
For decades the importance of rotating the wheels was not realised so
ignored resulting in significant uncorrectable errors. Rotating wheels
change the flowfield so a simple correction for the error is not
possible.Lower speed allowed a simpler model construction than the aircraft
models.cheers,Frank
On Friday, 4 May 2018, 20:35, Jim Nichols <jhnichols at lighttube.net>
wrote:
Thanks, Frank.? I never tested any cars, but a co-worker helped Sverdrup
design some automotive wind tunnels.
Jim Nichols
Tullahoma, TN USA
On 5/4/2018 2:26 PM, FRANK DERNIE via LUG wrote:
> Brilliant. Super to see the wind tunnel models.Frank D.
>
>? ? ? On Friday, 4 May 2018, 20:19, Jim Nichols <jhnichols at
>lighttube.net> wrote:
>?
>
>? I appreciate all of the responses to my posting of APS images. One
> LUGGER who responded off-list asked if I had any more of these APS
> images.? In reviewing my images from 1986, I found another set.
>
> Normally, cameras are not allowed on-base at Arnold Engineering
> Development Center, where I spent 39 years.? But, in 1986, the base held
> an open house for employees and their families. Displays were set up
> showing items of interest, and cameras were permitted.? I took advantage
> of this opportunity to capture a few images to which I had not had
> access previously.? I am almost positive that the Kodak APS camera was
> my choice that day.
>
> The Propulsion Wind Tunnel Facility is composed of two 16-ft wind
> tunnels and one 4-ft wind tunnel, along with the plant equipment to
> support them.? The main drive system for the large tunnels originally
> had 216,000 HP on one shaft, and has since been upgraded.? Here is a
> view of the compressor for the transonic tunnel.
>
> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+16T+Compressor+from+Across+the+Street.JPG.html
>
> That red & white stack is 200 ft tall.
>
> This is the nameplate on one of the two largest motors.
>
> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+PWT+Large+Motor+Nameplate.JPG.html
>
> This is one of the numerous auxiliary compressors that support the
> tunnel operations.
>
> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+PES+F-Unit.JPG.html
>
> At the time of the open house, a lot of store testing was being done in
> the transonic tunnels and three neat models were on display:
>
> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+A-10+Test+Model+from+16T.JPG.html
>
> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+FB-111+Test+Model+from+16T.JPG.html
>
> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+F-16+Test+Model+from+16T.JPG.html
>
> The little Kodak APS camera did its job!
>
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