Combustion in homogeneous charge compression ignition (HCCI) engine is controlled auto ignition of well-mixed fuel, air and residual gas. Since onset of HCCI combustion depends on the auto ignition of fuel/air mixture, there is no direct control on the start of combustion process. Therefore, HCCI combustion becomes unstable rather easily especially at lower and higher engine load. Charge strati...

Autoignition of n-heptane droplet/vapor/air mixtures behind an oblique shock wave are studied, through Eulerian-Lagrangian method and a skeletal chemical mechanism. The effects gas/liquid equivalence ratio (ER), droplet diameter, flight altitude, Mach number on the ignition transient timescales investigated. results show that excitation time to delay can be used predict detonation (ODW) transit...

The droplet evaporation and autoignition behaviour of a three-component kerosene surrogate is numerically investigated for wide range ambient pressures temperatures representing realistic aero-engine conditions. Vitiated air with different levels dilution considered to represent mixing combustion products. Particular attention given the analysis multi-component fuel effects at various operating...

Autoignition risk in initially non-premixed flowing systems, such as premixing ducts, must be assessed to help the development of low-NOx systems and hydrogen combustors. Such situations may involve randomly fluctuating inlet conditions that are challenging model conventional mixture-fraction-based approaches. A Computational Fluid Dynamics (CFD)-based surrogate modelling strategy is presented ...