Re: turbojet riddle

[Jack Uretsky <jlu@HEP.ANL.GOV>]

Here's another way to look at John's question:
        John is showing you the steady state.
        (1) What makes the steady state stable against (not very large)
perturbations?
        (2) How does one get to the steady state from rest?
                        Regards,
                                Jack

Adam was by constitution and proclivity a scientist; I was the same, and
we loved to call ourselves by that great name...Our first memorable
scientific discovery was the law that water and like fluids run downhill,
not up.
                          Mark Twain, <Extract from Eve's Autobiography>

On Sun, 2 Jan 2000, Ludwik Kowalski wrote:

> A set of two parallel resistors comes to mind. Practically all
> charge (exhaust gas) flows through R1 when R1<<R2. The
> diameters and lengths of tubes through which gasses flow
> in and out of the combustion chamber are designed to make
> this happen. That is my guess. I do not know how many kg
> of airs must be taken in to burn 1 kg of fuel.
>
> John Denker asked:
>
> > ... So the big question is, why does this high-pressure gas
> > decide to go out the back rather than going out the front
> > [of a jet engine]?