Three-Dimensional Simulation for Helical Intake Port of 4BTAA Diesel Engine

The three-dimensional flow field in an un-simplified helical intake port was numerically simulated using CFD software for a practical engine.The calculation results of the port quality evaluation,flow coefficient and torque show good (agreement) with the flow test results.The simulated flow field provides a detailed insight into the processes governing air flow under port bench conditions.The developed port has been manufactured for the 4BTAA diesel engine which has come up to the Europe Ⅱ emission standard.The good agreement indicates that CFD simulation is reliable for use by the engine developer to provide directions for port design.