Mr Helmholz - simple model

[Greg Hermann]

>I was thinking ( rare but it does happen) when a standing wave is set up
>the exhaust would be moving slowwer (higher pressure).

Hey--in the flow of a compressible fluid, higher pressure = higher temp,
without even worrying about contact time. Just the way it works.

Greg
>
>where the standing wave was there would be more of a heat buildup
> due to a slightly longer time in contact with the pipe.