MS1-1: Development of a Three-Dimensional Combustion Model Considering Time-scale Interaction and Its Application to Diesel Combustion(MS: Modeling and Simulation,General Session Papers)

抄録

Diesel combustion is a complex process, including autoignition, premixed combustion and diffusion combustion. A novel TI (Time-scale Interaction) combustion model has been developed for simulating diesel combustion phenomena with high accuracy from premixed combustion to diffusion combustion. This model takes into account the characteristic time scales of chemical reactions and turbulence eddy break-up so as to match actual combustion modes. Performance tests were conducted with a single-cylinder direct-injection diesel engine that was used in the experimental validation of the TI combustion model. Comparisons of the calculated and measured pressure histories and heat release rates under various engine operating conditions showed good agreement. The diesel combustion mechanism was analyzed under several fuel injection timings and engine loads using the TI combustion model.