March 6 - 8, 2017 | Berlin
LEADING ENGINEERING SIMULATION CONFERENCE
Increasing the EGR capability of heavy duty truck engıne performance by using optimization and 1D-3D cosimulation tools
In diesel engines, making the exhaust gasses recirculated is one of the key methods in order to reduce the NOx emissions of the vehicle. As better EGR capability concerned, it gives the opportunity to choose the the best option to calibrate the engine in best condition not only purpose of reducingthe exhaust emission but also achieving higher fuel efficiency target.
In this study, by helping of STAR-CCM+® 1D-3D CFD cosimulation methodology with GT-POWER software, two different internal structure’s to EGR pumping capability are assessed. These designs are named as Orifice structure and pulse EGR valve.
The performance of orifice structure located between two main exhaust manifold frames, is proved regarding increase EGR capability. However, the same effect isn’t seen in fluid diode valve structure as the same as orifice structure performance assessment .
Optimization study on the internal feature of fluid diode valve is assessed. On four different internal structures parametrised with 12 different parameters, optimization study was performed by performing steady state simulations and focusing only the area of internal structures in order to validate the significant effect.
As the EGR capability concerned for such study, second optimization study was performed on the model prepared for 1D-3D coupled simulation.
Keywords: EGR, Exhaust Manifold, Static Reed Valve, Optimization, 1D-3D CFD Cosimulation