[AR] Re: Nozzle shapes
- From: Ben Brockert <wikkit@xxxxxxxxx>
- To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>, Alexander Ponomarenko <contact@xxxxxxx>
- Date: Sun, 17 Nov 2013 19:51:56 -0700
Alexander, is the Rao output of RPA a fit mathematical function or is
the file it generates from the MoC without that approximation step?
Ben
On Sun, Nov 17, 2013 at 7:38 PM, Norman Yarvin <yarvin@xxxxxxxxxxxx> wrote:
> The way the Rao paper gets its curves is by (1) doing the precise
> calculation, via the method of characteristics, and (2) fitting a
> second-order polynomial curve to the result. The idea was to make it
> easy for people to build nozzles without having access to a computer
> and code to do the full calculations. Judging by your remarks, he was
> less than perfectly successful at this. If he were writing the paper
> these days, he'd probably just put the method-of-characteristics code
> on github and not bother about polynomial approximations. Output
> could consist of closely-spaced (r,z) coordinate pairs.
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