数值模拟具有四个腔室的多分支管道二维非定常流动

应用基于Ｇｏｄｕｎｏｖ格式的二维非定常流数学模型，模拟具有四个腔室的多分支管道内的瞬变气体运动，以便对该气体运动的发展过程有一更好的了解。根据所给出的模型编制了相应的计算及绘图软件。数值模拟定量给出了多分支管道内详细的速度矢量场，压力样梯度场及各分支管道的质量流量变化曲线。并对多分支管道内非定常气体运动过程的某些特征做出了分析和讨论。计算结果表明：基于Ｇｏｄｕｎｏｖ格式的非线性波作用计算方法能成功地处理合压力波（包括激波）的传播发展和含复杂几何形状边界的多分支管道流动问题。因此该方法可以作为一个有效的数值分析工具，用来精确预测多分支管道内详细的压力变化、速度变化和质量流量变化的过程。

NUMERICAL SIMULATION OF 2-DIMENSIONAL UNSTEADY FLOWS IN MANIFOLDS WITH FOUR CHAMBERS

This paper describes a two-dimensional unsteady compressible gas flow model aimed at producing a better understanding of the transient flow in manifolds. A computer simulation programme corresponding to the model has been developed.The simulation gives a detailed quantitative picture of the velocity field, pressure distribution and instantaneous mass flow rate within the manifold. Some characteristics of the unsteady gas transfer process in the manifold are discussed.The results of the calculation show that the non-linear wave action calculation technique, based on the Godunov's method, can successfully deal with the pressure wave including the shock wave propagation and the complicated geometrical configuration of the manifold and therefore can be a valuable analysis tool to predict accurately the detailed variation of the pressure, velocity and the mass flow rate in manifolds.