IGNITION IN AN UNSTEADY MIXING LAYER SUBJECT TO STRAIN AND VARIABLE-PRESSURE

A general formulation is given for ignition in nonpremixed systems inv olving time-dependent mixing of fuel and oxidizer streams that experie nce both strain and time-varying pressure, subject to one-step, Arrhen ius chemistry. From this general formulation, a number of specific sit uations are identified that require separate ignition-stage analyses. These ignition-stage analyses are completed for those cases that appea r to be of greatest relevance to autoignition in Diesel engines. The r esulting ignition times may thus be employed in arriving at estimates of Diesel ignition.