CFD Calculation and Analysis of Three-blade Throttle Intake System

For a new three‐blade throttle ,the boundary conditions of 3D CFD calculation for intake manifold under engine steady state conditions were acquired through the engine bench test ,12 typical operating points with different speeds and loads were selected ,the network models of intake manifold with single‐blade and three‐blade throttle were built and the CFD calcula‐tion and flow analysis were conducted .The results show that the intake swirl intensity of the three‐blade throttle is greater than that of the single‐blade throttle and the trend becomes more obvious with the increase of throttle opening in medium and high load ,but it show s opposite trend in low speed and low load .