Numerical Simulation Study on Intake Port of C14D Engine
|School||Wuhan University of Technology|
|Course||Power Machinery and Engineering|
|Keywords||Numerical Simulation Improved inlet Flow Coefficient CFD|
In the gasoline engine , the inlet is to determine the coefficient of charge , the process of mixture formation and combustion of the key factors of quality ; into the cylinder in the intake air amount and the resulting flow state is affecting the internal combustion engine power, economy and emissions performance of the main factors . The traditional design flow inlet is experienced steady flow test rig design with repeated tests. In the design and development of the existence of greater blindness and limitations , not only design and development cycle is long, consuming large and difficult to get the ideal solution. The gas flows through the inlet of the three-dimensional numerical simulation , the flow coefficient obtained , airway pressure, flow rate and other parameters of the spatial distribution and shape , airway , mounting position and the gas flow characteristics ( including flow coefficient, etc. ) relationship for automotive engine intake and exhaust channels provide the basis for design and improvement . This research work : 1. Summarizes the development of methods gasoline engine inlet fluid followed by physical laws and mathematical models related theories . (2) the use of 3D modeling software UG, established a solid model. 3 Use FIRE, including the establishment of the airway - valve - cylinder including a computational mesh . 4 Use the FIRE three-dimensional simulation . Computer simulation outlet channel flow coefficient , the intake flow velocity field , pressure field and roll trace diagrams and three-dimensional flow simulation results . 5 Comparison of different turbulence models for simulation results. 6 on the basis of the original model , and the combustion chamber to change the angle airway model , comparing the simulation results before and after improvement . The significance of this paper : CFD simulation through the inlet , the inlet structure obtained on the flow coefficient of the law , and the use of CAD / CFD means of combining analyzes tangential airway and Punta shaped combustion chamber angle changes a gasoline engine inlet flow field .