1. Unsteady Analysis for Combustion Characteristics of PRF75 Fuel under HCCI Conditions
- Author
-
Tae Kyun Oh and Su Ryong Lee
- Subjects
Ignition system ,Control theory ,Chemistry ,Oscillation ,law ,Homogeneous charge compression ignition ,Low temperature combustion ,Nozzle ,Mechanics ,Ignition delay ,Combustion ,Combustion phasing ,law.invention - Abstract
Tae Kyun Oh and Su Ryong LeeABSTRACTHCCI engines have mainly focused on achieving low temperature combustion in order to obtain higher effi-ciency and lower emission. One of practical difficulties in HCCI combustion is to control the start of com-bustion and subsequent combustion phasing. The choice of primary reference fuels in HCCI strategy is one of various promising solutions to make HCCI combustion ignition-controlled. The behavior of ignition delay to the frequency variation of sinusoidal velocity oscillation is computationally investigated under HCCI con-ditions of PRF75 using a reduced chemistry in a counterflow configuration. The second-stage ignition is more delayed as the higher frequency is imposed on nozzle velocity fluctuation whereas the first-stage ignition is not much influenced.
- Published
- 2013