Evaluation of the surrogates capacity to reproduce the laminar burning velocities and the sensitivity to stretching of a commercial kerosene under constant volume combustion conditions

Dortz, Romain Le; Strozzi, Camille; Sotton, Julien; Bellenoue, Marc

doi:10.1016/j.fuel.2020.119426

Cited by 14 publications

(1 citation statement)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Vukadinovic et al [7] studied the influences of pressure and temperature on S 0 u and the Markstein number of kerosene Jet A-1 at initial temperatures of 373, 423 and 473 K and initial pressures from 100 to 800 kPa. Several other works [8][9][10], in all of which the initial pressure condition was no less than 100 kPa, also focused on the S 0 u of kerosene and its surrogate fuels.…”

Section: Introductionmentioning

confidence: 99%

Laminar Burning Speed of Aviation Kerosene at Low Pressures

et al. 2022

View full text Add to dashboard Cite

Aero-engine combustors may experience extreme low pressures in the case of an in-flight shutdown, which makes the study of aviation kerosene flame propagation characteristics at low pressures important. The present work examined flame propagation during the combustion of aviation kerosene over the pressure range from 25 to 100 kPa using a constant-volume bomb apparatus. The laminar burning speeds at different initial pressures, temperatures and equivalence ratios were measured and compared. In addition, numerical simulations were used to examine the reaction sensitivity of the laminar burning speed at low pressure. In trials at the lean flammability limit, the data indicated that it was more difficult to ignite the fuel under a lower pressure condition of 25 kPa and a lower temperature condition of 420 K. The experimental results of laminar burning speed were fitted to an equation providing the laminar burning speeds expected at different pressures (25–100 kPa), temperatures (400–480 K) and equivalence ratios (0.8–1.5). The temperature index (α=1.76) and pressure index (β=−0.15) of the fitting equation were obtained. Both hydrodynamic and diffusional thermal flame instabilities were found to be suppressed at low pressures. The negative effects of two specific reactions on laminar burning speed were greatly reduced at these same low pressures of 25 kPa.

show abstract