中文摘要：

现较为成熟的CFD仿真软件均为国外所有，国内缺乏相应的知识产权。为此，本文自主研发了一套仿真程序，对内燃机缸内三维工作过程进行数值模拟。本文建立了动态层网格模型和匹配的任意边界模型，采用有限体积方法离散流场控制方程，通过SIMPLEC算法求解NS方程，基于FORTRAN语言开发了一套内燃机缸内流场仿真软件。对内燃机的缸内空气纯压缩和膨胀过程做了仿真分析，计算结果表明，缸压曲线、缸内温度曲线与应用商业软件PUMPLINX、FLUENT计算结果基本吻合，证明动网格模型和流场数值模拟方法正确，本文的程序有进一步市场应用的前景。

英文摘要：

As mature CFD simulation software is currently developed overseas and domestic companies lack intellectual property rights, to ameliorate this problem, Harbin Engineering University developed a set of simulation programs that, after many years of accumulation, have proven to be remarkably successful. To continue conducting a numerical simulation of the three-dimensional working process in the cylinder of an internal combustion engine, a dynamic layer model and a matching model with an arbitrary boundary were firstly established. Moreover, the finite volume method was used to discretize the flow field control equations, and the Navier-Stokes equation was solved using the SIMPLEC algorithm. Based on the FORTRAN language, a set of simulation software of the internal flow field inside the cylinder of a diesel engine was then developed. The air compression and expansion process inside the cylinder were subsequently simulated and analyzed. Moreover, results showed that the cylinder pressure curve and cylinder temperature curve agree well with results of commercial software PUMPLINX and FLUENT, testifying that the moving grid model and the flow field simulation method are correct and that the numerical simulation program has potential as a market application.