Effect of Temperature and Pressure on Laminar Flame Speed Measurements for Aviation Fuels

Sustainable aviation fuels (SAFs) are being considered as replacements for conventional Jet-A fuels. Several studies show that their laminar flame speeds (LFS) are broadly comparable. In this work, a global correlation for aviation fuel LFS was developed using literature data and numerical simulations, while neglecting chemical composition variations. The correlation assumes a functional dependence on equivalence ratio, initial temperature, and pressure. A combined dataset of 940 points was used, comprising 638 literature experiments and 302 simulated values extending into higher-temperature and higher-pressure regimes. Validation was performed against literature measurements, model predictions, and new experiments conducted at Texas A&M University. The proposed correlation exhibits strong overall agreement, with most predictions falling within ± 5 cm/s of measured values. New experimental measurements at 400 and 450 K aligned well with the correlation, whereas tests at 500 K were unsuccessful due to thermal degradation of the Jet-A sample. The derived correlation was subsequently used to analyze temperature and pressure effects of LFS for aviation fuels.