可变截面涡轮增压瞬态性能仿真研究

为研究可变截面涡轮喷嘴开度对发动机的性能影响,建立GT-power和MATLB/Simulink联合仿真模型。采用GT-power软件建立的TBD234V12可变截面涡轮增压柴油机仿真模型研究发动机稳态性能,联合MATLB/Simulink软件建立的可变截面涡轮增压柴油机控制模型,对发动机瞬态性能进行仿真计算。结果表明:在发动机瞬态工况下,可变截面涡轮增压系统可以明显改善常规增压柴油机的动力性、经济性和动态响应特性,并且有效降低增压柴油机的时滞性,涡轮迟滞时间的降幅约为30%。

Simulation of turbocharging performance of variable geometry turbine based on GT - power and Simulink

The change of turbine nozzle opening in a variable geometry turbocharged system has an important impact on engine performance. In order to study the effect of variable geometry turbine (VGT) nozzle opening on engine performance, A joint simulation model based on GT-power and MATLAB / Simulink was established. It uses simulation model of TBD234V12 variable geometry turbocharged diesel engine based on GT-power software to research steady state performance of engine and connects the control model of variable geometry Turbocharged diesel engine based on MATLAB / Simulink Software to execute simulation of transient performance of the engine. It turns out variable geometry turbocharging can significantly improve the dynamic, economical and dynamic response characteristics of conventional supercharged diesel engines under the engine transient conditions. And reduce the time lag of the supercharged diesel engine effectively,and the drop of Turbine hysteresis time is about 30 percent.