| 夏丽萍,林杰明,杨志峰,王金生.圆射流在非恒定横向流中的掺混扩散[J].水利学报,2001,32(5):0082-0089 |
| 圆射流在非恒定横向流中的掺混扩散 |
| Mixing of round jet in unsteady crossflow |
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| DOI： |
| 中文关键词: 数值模拟 RNG k-ε湍流模型 射流 非恒定横向流 掺混扩散 |
| 英文关键词: numerical simulation RNG k-ε turbulence model round jet unsteady crossflow mixing |
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| 摘要点击次数: 2906 |
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| 中文摘要: |
| 运用RNG k-ε湍流模型对圆射流在非恒定横向流中的的混合、扩散行为进行了数值模拟研究。采用计算流体动力学程序FLUENT解控制方程。选择了与前期实验模拟相同的2组参数进行数值计算，浓度场的数值与实验结果符合得很好。计算和实验结果显示，射流在非恒定横向流中的扩散行为与在恒定流中的情形存在显著差别，横向流的不稳定性有效地提高了射流的掺混扩散能力。 |
| 英文摘要: |
| The RNG k-ε turbulence model is applied to numerically simulate the round jet issuing into an unsteady crossflow,A CFD code,FLUENT,is adopted to solve the flow governing equation.The numerical solutions sucessfully reproduce the relevant similarity relations associated with the steady situation.Two flow situations,which have been investigated experimentally,are computed in the numerical modeling.The computed scalar fields agree well with the corresponding experimental results.It is found that the jet scalar pattern in unsteady crossflow is significant different from that of the same jet in a steady crossflow.The unsteadiness in crossflow enhances the mixing and dilution of the jet. |
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