Freezing of jet fuel within a buoyancy-driven flow in a rectangular optical cell

JPTS, kerosene, Jet A, and additized Jet A samples were cooled below their freeze point temperatures in a rectangular, optical cell. Images and temper ature data recorded during the solidification process provided information on crystal habit, crystallization behavior, and the influence of the buoyan cy-driven flow on freezing. n-Alkane composition of the samples was determi ned. The Jet A sample contained the least n-alkane mass. The cooling of JPT S resulted in the least wax formation, while the cooling of kerosene yielde d the greatest wax formation. The JPTS and kerosene samples exhibited simil ar crystallization behavior and crystal habits during cooling. Low-temperat ure additives modified the crystal habit of the Jet A fuel. Crystal shapes and sizes were recorded for use in future computational modeling.