On the development of general surrogate composition calculations for chemical and physical properties

Fuel surrogates offer an opportunity for expediting alternative fuel certification and next generation hardware design. In these applications, surrogates allow the opportunity to tailor fuel compositions and properties to generate a fuel blend with specific properties. Previously, we have shown the ability of surrogates to mimic prevaporized premixed combustion environments with some exceptions. However, these previous works did not consider additional fuel properties important to fuel spray characteristics (i.e., density, viscosity, and distillation curve). Here we report the extension of our surrogate calculator with these properties by comparing predictions with measured values for these properties as reported in their respective POSF specification sheets. In particular, the calculator uses a newly-developed method for predicting distillation curves of mixtures. This new method is accurate in predicting the distillation curve measured using ASTM D 86 to within about 3°C except at the final boiling point.