The Steady Flow Test and CFD Numerical Simulation on Improving Research of Locomotive Diesel Engine Helical Intake Port

In order to improve the performance of 16V240ZJB diesel engine, the method of steady flow test and CFD numerical simulation was adopted to do intake port structure optimization study. The previous design model of intake port was tested in the steady flow experiment system which provided the boundary condition for simulation calculation. The three-dimensional CAD model of intake port was built and then it was putted into AVL–FIRE platform to do CFD simulation with appropriate turbulence models and calculation methods. The detailed information of air flow field and discharge coefficient, swirl ratio of intake port was obtained by CFD simulation. Then the previous intake port structure was optimized to improve intake port performance. The research shows that CFD simulation is an efficient way to design engine intake port; Air flow condition is complex in the intake port and the parts nearing valve seat. Two improvement programs were discussed in this paper that can increase the air flux and improve the air flow condition.