| 内燃机压缩过程冷态流场的大涡模拟 |
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| 引用本文： | 曾文,解茂昭,周磊. 内燃机压缩过程冷态流场的大涡模拟[J]. 小型内燃机与摩托车, 2011, 40(4): 45-48 |
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| 作者姓名： | 曾文 解茂昭 周磊 |
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| 作者单位： | 1. 沈阳航空航天大学动力与能源工程学院辽 宁沈阳 110136
2. 大连理工大学能源与动力工程学院 |
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| 基金项目： | 中国博士后基金(20080430733); 国家重点基础研究发展规划“973”资助项目(2007CB210002) |
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| 摘 要： | 通过修改发动机多维CFD计算程序KIVA-3V，建立了内燃机压缩过程冷态流场的大涡模拟（LES）计算模型。利用此模型对内燃机压缩过程中缸内流场的水平速度及湍流动能进行了详细分析，并与k-ε模型进行了比较。结果表明与采用k-ε模型计算时相比，采用LES计算时显示了更为复杂的湍流结构，而且LES所能捕捉到的涡团结构范围要大于k-ε模型。同时，采用LES计算时得到的湍流动能要远远低于k-ε模型。
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| 关 键 词： | 湍流 大涡模拟 计算流体动力学 k-ε模型 |
Large-Eddy Simulation of Turbulent Flow in the Compression Process of Internal Combustion Engine |
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| Zeng Wen,Xie Maozhao,Zhou Lei. Large-Eddy Simulation of Turbulent Flow in the Compression Process of Internal Combustion Engine[J]. Small Internal Combustion Engine and Motorcycle, 2011, 40(4): 45-48 |
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| Authors: | Zeng Wen Xie Maozhao Zhou Lei |
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| Affiliation: | Zeng Wen1,Xie Maozhao2,Zhou Lei21-School of Engine and Energy Engineering,Shenyang Aerospace University(Shenyang,Liaoning,110136,China) 2-School of Energy and Power Engineering,Dalian University of Technology |
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| Abstract: | By amending the engine CFD package （KIVA -3V）, the large-eddy simulation （LES） model of turbulent flow in the process of compression of internal combustion engine was built. The horizontal speed and turbulent kinetic energy of turbulent flow in the compression process were simulated by this model. The results show that comparing with k - ε model, LES model shows significantly different and relatively more complex turbulent structures. Furthermore, the range of vortical structures that LES model can capture is wider than k - ε model. At the same time, turbulent kinetic energy of k -ε model is much higher than that of LES. |
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| Keywords: | Turbulent flow Large-eddy simulation （ LES） Computational fluid dynamics （ CFD） k - ε Model |
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