An Experimental Investigation of the Autoignition Characteristics of Camelina-Based Hydroprocessed Renewable Jet Fuel

摘要

A rapid compression machine (RCM) is used to study the autoignition characteristics of camelina-based hydroprocessed renewable jet (HRJ) fuel and JP-8 jet fuel at low temperature and low pressure conditions. The tests employ a new approach for creating the fuel/oxidizer gas mixture whereby liquid fuel is injected directly into the combustion chamber and vaporized before the test commences. Reproducibility measurements confirm the validity of this approach for high-fidelity gas-phase kinetic measurements. Ignition delay measurements are compared between camelina HRJ and JP-8 at a compressed pressure of 7 bar, an oxidizer-to-fuel mass ratio of 14.4 and compressed temperatures between 650 K and 800 K. Additional ignition delay measurements for camelina HRJ are reported over the same temperature range with a compressed pressure of 7 bar and an oxidizer-to-fuel mass ratio of 19.