Performance Assessment of Fuels TMEDA-DMAZ and Tonka۲۵۰ with Liquid Oxidizer AK۲۷

Tonka۲۵۰ is a liquid fuel containing equal percentages of triethylamine and xylidine which has attracted the attention of space industries due to its favorable performance characteristics. Tonka۲۵۰ has a low Ignition Delay (ID) time in the presence of AK۲۷ as a liquid oxidizer (about ۲۴ ms) and can be used as a starter fuel in engines working with a non-hypergolic combination of fuels and oxidizers. In recent years, due to the carcinogenic effect of Tonka۲۵۰, novel fuels have been introduced to replace it with high-performance properties and non-carcinogenic effects. A combination of tetramethyl ethylene diamine (TMEDA) and dimethyl aminoethyl azide (DMAZ) can be a candidate for this purpose. According to the results obtained from the current research, the equal weight percentage of TMEDA and DMAZ has an ID time of ۱۴ ms in reaction with AK۲۷. The ID time was measured through the cup test method with a fuel droplet in the liquid oxidizer. The density and density specific impulse of fuel TMEDA-DMAZ are close to those for Tonka۲۵۰ while the values of specific impulse for fuel TMEDA-DMAZ are about ۶ seconds more favorable than Tonka۲۵۰ at the chamber and exit pressures ۶.۸ MPa and ۰.۱ MPa, respectively. Therefore, it seems that fuel TMEDA-DMAZ is a good candidate for replacement for Tonka۲۵۰.

کلیدواژه ها:

TMEDA-DMAZ ، Tonka۲۵۰ ، AK۲۷ ، Ignition delay time ، Specific impulse