Simulation Analysis And Research Of Diesel Engine Inlet Based On High Power Density

The intake process has a very important influence on the overall performance of the diesel engine,especially for the high power density diesel engine.Good in-cylinder air flow movement is the key to improve the performance of the high power density diesel engine.Therefore,it is very important to study the motion of air flow in intake system to improve the performance of high power density diesel engine.Because the intake process of high power density diesel engine is a transient fluid motion process controlled by multiple parameters,the state parameters of air flow are not only a function of space,but also a function of time,which involves hydrodynamics.Aerodynamics and many other aspects of the content,so far it is difficult to calculate directly through written calculation.The three-dimensional simulation analysis of the intake system of diesel engine constructed by simulation software can not only flexibly set various complex boundary conditions,but also be used to compare the actual test results.Through the simulation and analysis,we can intuitively understand the movement of air flow in the intake system,and can discuss the influence of the main parameters of the intake system components on the flow state.In this paper,converge software is used to simulate the intake process of a single cylinder high power density diesel engine with 110 cylinder diameter.Under different intake parameters,the simulation results are obtained by cfd calculation.The simulation results are compared with the experimental results under the same parameters to verify the accuracy of the simulation.At the same time,the microcosmic movement of air flow in the cylinder of this type of high power density diesel engine with different intake parameters is studied by using the conditionalvariable method,such as different inlet shape structure and different intake pressure.The influence of intake temperature and other structure and parameters of intake system on the intake process of this type of high power density diesel engine.