| 魏小华,槐文信,曾玉红,雒文生.同轴三维射流特性研究[J].水利学报,2006,37(9):1097-1101 |
| 同轴三维射流特性研究 |
| Numerical analysis of three-dimensional coaxial jets |
| 投稿时间：2005-07-25 |
| DOI： |
| 中文关键词: 同流环境 射流 数值模拟 混合有限分析法 |
| 英文关键词: coaxial ambient flow jet numerical simulation hybrid finite analytic method |
| 基金项目:国家自然科学基金资助项目(50479038) |
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| 中文摘要: |
| 在k～ε双方程紊流模型的基础上，结合混合有限分析交错网格法，对同轴三维非浮力射流进行了数值模拟，得到了三维同轴射流的流动特性和浓度分布特性。将计算所得结果与前人的试验资料进行对比，两者的流动特性吻合较好；计算给出的浓度在横断面上的分布图以及在不同流速比下的变化规律与解析解的结果基本一致，进一步验证了数值模型的可靠性，表明建立的紊流数学模型及计算方法是有效的。 |
| 英文摘要: |
| The κ～εturbulent model is combined with hybrid finite analytic method (HFAM) to simulate the 3-D coaxial non buoyancy jet flow. The flow field and concentration distribution are studied. It is found that the effect of the jet is dependent on the ratio of jet velocity to ambient flow velocity. The length of jet core increases following the increase of the ratio and the effect of jet tends to weakened if the ratio is smaller. The trace of the jet is horizontally flow towards downstream and the iso concentration lines of pollution in the cross sections along the flow distance exhibit circular form. The calculated result is in good agreement with experimental data and the result of analytic method. |
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