中文摘要：

用DLR型k-ε紊流模型·BFC（边界拟合曲线坐标变换）法，对总扩散角为8°、扩散度为4的锥形渐扩管路内完全发展的不可压粘性紊流场进行了数值仿真，所研究的紊流在入口的雷诺数为1.16×10^5-5×10^5，在不同的模型函数、网格配置和雷诺数等计算条件下进行了数值仿真，分别给出了时均流速和紊流动能分布的计算结果，并分别与实验结果进行比较和分析，得知在不同计算条件下对计算结果的影响程度，计算结果与实验结果较好符合。

英文摘要：

Fully developed incompressible turbulent flow in a conical diffuser having a iotal divergence of 8° and an area ratio of 4 has been simulaled by a DLR k - ε turbulence model and its BFC（ Boundary Fit Coordinates） approach. The re.arch has heen donc for pipe entry Reynolds numbers of 1. 16 × 10^5 - 5 × 10^5 .The calculated result of the distribution of the mean flow velocity and turbulence energy has been given under the different calculated conditions, such as model functions and disp.siti.n of grid and Reynold numbers. It was analysed and compared with the Lest resuh respectively, and we obtain the effect of calculated result on the different caeulafing conditions,the eaculated results agree well with the experimental results.