Interaction of preferential evaporation and low-temperature chemistry in multicomponent counterflow spray flames

Impact of multi-component description of hydrophilic fuel droplets in propagating spray flames

“…Typical commercial fuels are composed of a large number of species, and require multicomponent modeling for the numerical description of spray flames [1][2][3][4]. Investigations about the multi-component description of droplets in non-reacting atmospheres are found in the literature for single droplets (e.g.…”

“…From the published works accounting for multi-component droplets in reacting flows (e.g. [2,3,[15][16][17][18][19][20][21]), both [2,3] stand out. Shastry et al [2] investigated one-dimensional flames propagating in multi-component sprays using a detailed description of the chemistry.…”

“…The importance of the multi-component description of droplets is noticed in terms of the stratified mass exchange caused by the different vapor pressures of different components. Differential diffusion effects in reacting flows are included in [3], which also investigates alkane mixtures representing Jet-A surrogates. 1D Counterflow spray flames were simulated using a detailed description of the chemistry.…”

“…The flame front position is where the gas temperature is increased by 200 K compared to the inlet temperature 3. It must be remembered that the mixture's absolute enthalpy differs between SP and spray cases.…”

Reduced Reaction Mechanisms for Sustainable Aviation Fuel (SAF): Isoparaffinic Alcohol-to-Jet Synthetic Paraffinic Kerosene (AtJ-SPK) and Its Blends with Jet A

“…11 As found in our previous study, 31 the evaporation rate of each component in the multicomponent fuel is different from each other, which has also been proven to considerably affect the flame structure and autoignition behavior. 32,33 On the one hand, although HyChem C1 12 and C1A2 30 mechanisms can consider the actual distillation curve of the liquid fuel and fuel blends, 34 this kind of nonuniform evaporation effect could not be explicitly reflected as AtJ-SPK and Jet A are considered as virtual pure substances in the implementation. On the other hand, those detailed mechanisms developed based on the fuel surrogate method, such as LLNL-AtJ-SPK and POLIMI detailed mechanisms, can explicitly consider this effect, but their sizes are very large for computational fluid dynamics (CFD) and make them very hard and almost impossible to use, particularly in the threedimensional (3D) CFD calculations.…”