D_Hall wrote: ↑Tue Sep 09, 2025 11:05 pm
Turbine32 wrote: ↑Tue Sep 09, 2025 8:28 am
Salutations et Merci pour ce fabuleux travail !
Je recherche comment l'utiliser, de souvenirs hgdt était un calculateur excellent avec plus de gaz disponibles il aurait été plus abouti
Pour de l'hybride
From a performance perspective, there isn't much difference between different hydrocarbons. It's been a long time, but I recall reading a paper wherein the performance of different hydrocarbons (methane, ethane, propane, and butane) were studied in gas gun applications. There was a measurable difference, yes, but it was also small enough that the author concluded that one should simply use whatever fuel was easiest/cheapest for them to get. The biggest issue is that you're limited by the oxygen content in air no matter what fuel you use. If you start using supplimental oxygen, things change, of course. But if you're using oxygen enrichment techniques you're asking for a detonation and playing games at a high enough level that you shouldn't need HGDT (or SDT).
Energy content wise, there is very little difference between hydrocarbons, especially the simple ones like methane, ethane, propane, butane, ...
Acetylene and hydrogen are outliers. They both burn considerably faster than the simple hydrocarbons and they both have much wider combustibility limits. That means mixtures don't have to be as accurate to get combustion. But if you are far from the stoichiometric mix, the energy released is greatly reduced.
Here's my old page on fuels that includes things like stylometry, fuel air ratio and a table with flame front speeds.
http://www.inpharmix.com/jps/Combustion_fuels.html
