Combustion behavior of ammonia blended with diethyl ether

Ammonia (NH3) is recognized as a carbon-free hydrogen-carrier fuel with high content of hydrogen atoms per unit volume. Recently, ammonia has received increasing attention promising alternative for internal combustion engine and gas turbine applications. However, the viability fueling future devices several barriers to overcome. To overcome challenge its low reactivity, it proposed blend high-reactivity fuel. In this work, we have investigated characteristics ammonia/diethyl ether (NH3/DEE) blends using rapid compression machine (RCM) constant volume spherical reactor (CVSR). Ignition delay times (IDTs) NH3/DEE were measured RCM over temperature range 620 942 K, pressures near 20 40 bar, equivalence ratios (Φ) 1 0.5, mole fractions DEE, χDEE, from 0.05 0.2 (DEE/NH3 = 5 – 20%). Laminar burning velocities premixed flames CVSR at 298 Φ 0.9 1.3, χDEE 0.1 0.4. Our results indicate that DEE promotes reactivity resulting in significant shortening ignition under conditions. IDTs expectedly exhibited strong dependence on pressure ratio given blend. velocity was found increase fraction DEE. The burnt Markstein length increased seen NH3-air flames, while opposite evolution observed < ≤ 0.4, isooctane-air flames. A detailed chemical kinetics model assembled analyze understand blends.