中文摘要：

针对海洋石油工程中废弃平台切割技术的需要，采用充分发展的入口条件结合标准壁面函数，将标准κ-ε模型、RNGκ-ε模型、Realizableκ-ε模型和雷诺应力模型应用于半封闭狭缝湍流冲击射流的数值模拟，采用减小网格尺寸和提高差分格式精度等措施来减小数值伪扩散对冲击射流流动的影响。结果表明：雷诺应力模型和Realizableκ-ε湍流模型在湍流冲击射流的数值模拟中具有一定的优越性，Realizableκ-ε模型的计算量较小；减小网格尺寸并不能降低数值黏性对计算结果的影响；提高差分格式的精度可以在一定程度上降低数值黏性对计算结果的影响，MUSCL格式并没有显著提高计算结果的精度。

英文摘要：

In order to meet the need of abandoned platform cutting technology used in offshore petroleum engineering, different turbulence models including the standard κ-ε model, RNG κ-εmodel, Realizable κ-ε model and Reynolds stress model were used to simulate the semi-confined slot turbulent impinging jet. In order to reduce the influence of numerical diffusion on the computational results, measures such as decreasing the mesh size and increasing the precision of difference scheme were used. The results show that the Reynolds stress model and the Realizable κ-ε turbulence model perform better than other two models. Decreasing the mesh size does not reduce the effect of numerical viscosity on computational results, and increasing the precision of difference scheme can reduce the effect of numerical viscosity on computational results at certain degree. And the Realizable κ-ε turbulence model in conjunction with MUSCL scheme shows a little better performance than other models.