Low temperature autoignition of Jet A and surrogate jet fuel

An experimental study of the low-temperature and low-pressure autoignition of Jet A and surrogate fuels was conducted using the ASTM-E659 standardized test method. Two surrogate fuels (Aachen and JI mixtures), their individual components and two batches (POSF-4658 and POSF-10325) of standardized Jet A were tested using the ASTM-E659 method for a range of fuel concentrations and temperatures. The ignition behaviors were categorized into four distinct ignition modes. The individual hydrocarbon components had a wide range of ignition behaviors and minimum autoignition temperatures (AIT) values depending on the molecular structure. The two Jet A batches showed similar ignition behavior with measured AITs of 229 +/- 3 degrees C and 225 +/- 3 degrees C respectively. Both surrogates exhibited similar ignition behavior to Jet A with comparable AITs of 219 +/- 3.1 degrees C (Aachen) and 228 +/- 3 degrees C (JI) with the JI mixture proving to be a more suitable surrogate to Jet A in the lowtemperature thermal ignition regime.

Automated summary

An experimental study on the low-temperature and low-pressure autoignition of Jet A and surrogate fuels revealed four distinct ignition modes, with the individual hydrocarbon components exhibiting varied ignition behaviors and minimum autoignition temperatures dependent on their molecular structures. The surrogates displayed similar ignition behaviors to Jet A, with the JI mixture proving to be a more suitable substitute in the low-temperature thermal ignition regime.