whilst looking for a better theory of pulse jets i trip over thermoacoustics?
an odd combination of
heat sound and resonators
http://en.wikipedia.org/wiki/Thermoacoustics
http://en.wikipedia.org/wiki/Thermoacou ... air_engine
http://www.lanl.gov/thermoacoustics/ehistory.pdf
http://www.pleinsud.u-psud.fr/specialR2 ... ustics.pdf
http://en.wikibooks.org/wiki/Engineerin ... oacoustics
is there anything here that is of interest to us