内燃机工程2024，Vol.45Issue(2)：64-74,11.DOI:10.13949/j.cnki.nrjgc.2024.02.008
重型柴油机二级增压系统匹配仿真研究
Simulation Study on Two-Stage Turbocharger Matching for Heavy-Duty Diesel Engines
摘要
Abstract
In order to reduce the fuel consumption rate of a heavy-duty diesel engine,the matching of a two-stage turbocharger using GT-POWER software was carried out on a single stage variable geometry turbocharger(VGT)diesel engine.Simulation results show the proposed two-stage turbocharging system can operate at peak efficiency at the matching point and provide sufficient intake airflow across all operating conditions.Fully closing the wastegate valve in the low-pressure stage and synergistically optimizing the wastegate valve opening in the high-pressure stage along with Miller cycle valve closing angle can further reduce the fuel consumption rate of the two-stage turbocharged engine.Furthermore,reducing the intercooler temperature between stages can reduce pumping losses and enhance boost pressures.Specifically,a temperature reduction from 100℃to 50℃at the rated point can result in an approximate improvement of 3 g/(kW·h)in fuel consumption rate.Experimental validation of the improvement in fuel efficiency from the two-stage turbocharging system was conducted,revealing reduction in fuel consumption rates during low-speed operating conditions and reduction of 4.1%in fuel consumption rate at the high-efficiency operating point.关键词
柴油机/二级增压/增压匹配/遗传算法/燃油消耗率Key words
diesel engine/two-stage turbocharging/turbocharger matching/genetic algorithm/fuel consumption rate分类
能源科技引用本文复制引用
赵明昊,殷勇,赵艳婷,郑尊清..重型柴油机二级增压系统匹配仿真研究[J].内燃机工程,2024,45(2):64-74,11.基金项目
国家自然科学基金项目(51921004) National Natural Science Foundation of China(51921004) （51921004）
