OPTIMIZATION OF A REDUCED CHEMICAL KINETIC MODEL FOR HCCI ENGINE SIMULATIONS BY MICRO-GENETIC ALGORI

• 作 者: 黄豪中 苏万华
• 机 构: STATE KEY LABORATORY OF ENGINES SCHOOL OF MECHANICAL ENGINEERING TIANJIN UNIVERSITY,TIANJIN 300072,C
• 出 处: Transactions of Tianjin University
• 发表日期: 2006年01期
• 关键词: RATIO FIRST RADIUS OVER WIDE 孟二 GRAM 土卫 LASER SHELL

A REDUCED CHEMICAL KINETIC MODEL (44 SPECIES AND 72 REACTIONS) FOR THE HOMOGENEOUS CHARGE COMPRESSION IGNITION (HCCI) COMBUSTION OF N-HEPTANE WAS OPTIMIZED TO IMPROVE ITS AUTOIG-NITION PREDICTIONS UNDER DIFFERENT ENGINE OPERATING CONDITIONS. THE SEVEN KINETIC PARAMETERS OF THE OPTIMIZED MODEL WERE DETERMINED BY USING THE COMBINATION OF A MICRO-GENETIC ALGORITHM OPTIMIZATION METHODOLOGY AND THE SENKIN PROGRAM OF CHEMKIN CHEMICAL KINETICS SOFTWARE PACKAGE. THE OPTIMIZATION WAS PERFORMED WITHIN THE RANGE OF EQUIVALENCE RATIOS 0.2-1.2, INITIAL TEMPERATURE 310?375 K AND INITIAL PRESSURE 0. 1-0. 3 MPA. THE ENGINE SIMULATIONS SHOW THAT THE OPTIMIZED MODEL AGREES BETTER WITH THE DETAILED CHEMICAL KINETIC MODEL (544 SPECIES AND 2 446 REACTIONS) THAN THE ORIGINAL MODEL DOES.

A REDUCED CHEMICAL KINETIC MODEL (44 SPECIES AND 72 REACTIONS) FOR THE HOMOGENEOUS CHARGE COMPRESSION IGNITION (HCCI) COMBUSTION OF N-HEPTANE WAS OPTIMIZED TO IMPROVE ITS AUTOIG-NITION PREDICTIONS UNDER DIFFERENT ENGINE OPERATING CONDITIONS. THE SEVEN KINETIC PARAMETERS OF THE OPTIMIZED MODEL WERE DETERMINED BY USING THE COMBINATION OF A MICRO-GENETIC ALGORITHM OPTIMIZATION METHODOLOGY AND THE SENKIN PROGRAM OF CHEMKIN CHEMICAL KINETICS SOFTWARE PACKAGE. THE OPTIMIZATION WAS PERFORMED WITHIN THE RANGE OF EQUIVALENCE RATIOS 0.2-1.2, INITIAL TEMPERATURE 310? 375 K AND INITIAL PRESSURE 0.1 -0. 3 MPA. THE ENGINE SIMULATIONS SHOW THAT THE OPTIMIZED MODEL AGREES BETTER WITH THE DETAILED CHEMICAL KINETIC MODEL (544 SPECIES AND 2 446 REACTIONS) THAN THE ORIGINAL MODEL DOES.