[AR] Re: Concussion Wind tunnel
- From: "Monroe L. King Jr." <monroe@xxxxxxxxxxxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Sat, 06 Sep 2014 19:06:58 -0700
Ray, if you liked that one here's a nice paper about it.
http://www.dtic.mil/dtic/tr/fulltext/u2/a211364.pdf
Very detailed.
Monroe
> -------- Original Message --------
> Subject: [AR] Re: Concussion Wind tunnel
> From: "Ray Rocket" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender
> "ar0cketman@xxxxxxxxx" for DMARC)
> Date: Fri, September 05, 2014 4:09 pm
> To: arocket@xxxxxxxxxxxxx
>
>
> On Thu, 9/4/14, Norman Yarvin <yarvin@xxxxxxxxxxxx> wrote:
> > >Don't many supersonic tunnels inherently operate in a "very transient"
> > >mode? I thought that was a common characteristic of such systems...
>
> > More like "transient" than "very transient". The idea is something
> like "we compressed a lot of air on one end, and pulled a vacuum on
> the other end, and got supersonic flow for a fraction of a second
> after breaking the separating membrane", not "we were trying to
> get data from a shock wave whose thickness
> is measured in microns".
>
> > (Shock waves are closely followed by expansion waves, after which the
> gas slows back down. With really huge explosions -- as in, nuclear --
> there can be a serious distance between the two, but for anything an
> experimenter in the same room can survive, the distance will be
> microscopic.
>
> Oh, if scale is an issue, YSK that a very large shock tube exists:
> http://www.wsmr.army.mil/testcenter/TE/services/neee/ne/Pages/Blast.aspx
>
> The 20-meter diameter, 170-meter long, concrete shock tube
> burns LOx and powdered aluminum, heating nitrogen to simulate
> nuclear overpressure and thermal effects.
>
> I'd like to know what kind of concrete can endure this kind of environment!
>
>
> Ad Astra,
>
> Ray
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