内燃机工作过程多维模型计算机仿真平台设计与实现

设计了内燃机工作过程仿真集成化PC平台.以缸内流体动力学为基础,耦合反映缸内工作过程的喷射、燃烧和碳烟生成等子模型构建了平台的多维模型;通过设置Compaq Visual Fortran软件的双精度运行环境,在PC微机上成功编译了KIVA-3V源代码;然后通过设计可视化模块,实现了平台计算与可视的集成化功能.试验分析表明:仿真平台能模拟内燃机缸内工作过程,准确反映客观物理因素对工作过程的影响,仿真误差小于5%,可以在内燃机行业推广.

Design and Realization of the Computer Simulation Platform of Multi-Dimensional Models for In-Cylinder Process of Engine

This study investigated the design of the simulation software for in-cylinder process of internal combustion engine.First,The multi-dimensional model was constructed by integrating such sub-models as spray,combustion,soot,etc.into the model of in-cylinder CFD.Second,Double Precision System(DPS) of Compaq Visual Fortran was set and the KIVA-3V code was compiled by means of PC computer.Third,a special module was designed and integrated in KIVA-3V code for visualizing the solution by AutoCAD.Finally,the discussion was demonstrated by comparing and analyzing the predicted and measured results after simulating and testing Caterpillar3406 diesel engine.The results showed that a huge number of data,figures and curves connecting with thermodynamics,emissions,as well as combustion procedure were obtained.It has been concluded that the software of multidimensional models for in-cylinder Process of Engine is workable,and can be applied to the internal combustion engine industry.