Effect of Water and Humidity on Hypergolic Propellant Ignition Delay
Download 0.9 Mb. View original pdf
|
| B. Triethylamine Borane Triethylamine is a liquid which has been thoroughly studied as rocket fuel. It has been primarily considered as an additive to fuels to improve ignition characteristics and decrease viscosity, but researchers have also considered triethylamine as an unblended fuel Triethylamine is hypergolic with WFNA and the IDT has been measured as low as 18 ms, significantly lower than most amines. 3 Several researchers have determined that the inclusion of borane groups can improve the IDT of ionic liquids and amines. 3,10 Ramachandran et al. showed that the inclusion of a borane group with triethylamine, making TEAB, further reduces the IDT with WFNA to only 3.4 ms Willits et al. compared the engine performance characteristics of TEAB and estimated only as deficiency in I sp when compared to MMH/RFNA. They also showed that the combustion efficiency of TEAB/WFNA is nearly equivalent to MMH/RFNA with similar injection parameters in an impinging jet system. 11 According to the MSDS, liquid TEAB has a density of 777 kg/m 3 , a freezing point of -C, and a boiling point of C Although the density of TEAB is lower than that of MMH by 12%, the density-I sp ( I sp ) of TEAB/WFNA is Downloaded by PURDUE UNIVERSITY on July 21, 2017 | http://arc.aiaa.org | DOI: 10.2514/6.2015-3867 American Institute of Aeronautics and Astronautics 4 within 2% of MMH/RFNA because the stoichiometric oxidizer to fuel mass ratio is higher for TEAB. 11 Table 1 compares the performance of these propellant combinations. Download 0.9 Mb. Share with your friends:
|