可变喷嘴涡轮增压器与柴油机匹配的数值模拟  

Numerical Investigation on the Matching of Variable Nozzle Turbocharger and Diesel Engine

作　　者：邢世凯[1] 马朝臣[2] 高建兵[2] 

机构地区：[1]河北师范大学职业技术学院,石家庄050024 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《内燃机工程》2016年第3期139-143,共5页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(51276018);河北省教育厅自然科学研究基金项目(QN20131017)

摘　　要：利用GT-Power一维仿真软件,建立了J90S固定截面涡轮增压柴油机WD615.50的仿真计算模型,并与试验数据进行对比,验证模型的准确性。在此基础上,将原机的J90S固定截面涡轮增压器改为JK90S可变喷嘴涡轮增压器,建立可变喷嘴涡轮增压柴油机的仿真计算模型,对JK90S与WD615.50柴油机的匹配规律进行数值模拟。数值模拟结果表明:与固定截面涡轮增压器相比,在柴油机低速工况下,通过关小可变喷嘴涡轮增压器喷嘴环叶片的开度,柴油机进气更加充足,功率及转矩稍有增加,经济性有所改善。根据数值模拟结果,确定了最佳喷嘴环叶片开度随柴油机转速及负荷的变化规律。A simulation model of WD615.50 diesel engine with a common J90S turbocharger was established in GT-Power software, which was verified by comparing to the experimental data. Based on that, a simulation model of WD615. 50 diesel engine with JK90S variable nozzle turbocharger was established. With the simulation computational model of variable nozzle turbocharger, the matching rule between JK90S variable nozzle turbocharger and WD615. 50 diesel engine was investigated and analyzed. Results indicate that compared to the common turbocharger, the variable nozzle turbocharger can obtain much more intake air by turning down the variable nozzle under low-speed conditions coupled to a slight increase of engine power and torque and hence a little reduction of fuel consumption. Based on the numerical simulation, the change rule of the optimum opening of the turbocharger nozzle vane with the diesel engine speed and load can be determined.

关 键 词：内燃机 柴油机 可变喷嘴涡轮增压器 匹配 模拟 性能优化 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]