基于一三维模型耦合仿真的柴油机进气系统优化

摘要

A diesel ID thermodynamics model and several 3D intake plenum CFD models of different volume are set up. A coupling simulation between diesel ID model and intake system 3D models is performed. The intake massflow and unevenness are calculated on the base of simulation results and then the intake unevenness is evaluated , at last the most optimum design is certified considering intake massflow and unevenness.%建立了某柴油机整机一维热力学模型和不同容积集气腔三维CFD模型,通过一三维模型耦合进行进气系统瞬态仿真研究,根据模拟结果分别计算了不同容积集气腔对应的各缸进气量和进气不均匀度,并对进气不均匀度进行了评价,根据进气量和进气不均匀度确认了最优化的进气系统.