| 湍流入口条件对CFD计算结果影响的数值分析 |
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| 引用本文： | 雷林,孙鹏.湍流入口条件对CFD计算结果影响的数值分析[J].舰船科学技术,2009,31(7):32-36. |
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| 作者姓名： | 雷林 孙鹏 |
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| 作者单位： | 重庆交通大学,重庆,400074 |
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| 基金项目： | 重庆市科学技术委员会资助项目 |
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| 摘 要： | 在计算流体力学软件FLUENT中,包含有很多计算模型,对于不同的问题需要采用一种较好的模型进行解决,目前较为广泛使用的湍流模型是k-ε二方程模型.本文基于CFD软件,应用k-ε二方程湍流模型对细长体绕流问题进行数值模拟计算,进而比较湍流模型中湍流参数的设置对计算结果的影响.通过模拟计算得到的湍流强度(%)Ⅰ及粘性比的取值范围有较好的适应性;水下片体间存在有利干扰和不利干扰,采用k-ε二方程湍流模型计算双体的互相干扰是可行的.
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| 关 键 词： | 数值模拟 k-ε模型 湍流强度 k-ε model |
The numerical analysis of the impact of the onflow entrance condition on CFD calculation |
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| LEI Lin,SUN Peng.The numerical analysis of the impact of the onflow entrance condition on CFD calculation[J].Ship Science and Technology,2009,31(7):32-36. |
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| Authors: | LEI Lin SUN Peng |
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| Institution: | Chongqing Jiaotong University;Chongqing 400074;China |
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| Abstract: | The software FLUENT that calculates fluid dynamics contains a lot of computing models. Different issues need to adopt a better model solution, which requires a good understanding of the models. Nowadays the k-ε model is widely used. The paper applies the k-ε model to carry numerical simulation calculation and compare parameter settings. Calculated by simulating the onflow intensity (%) Ⅰ and the viscosity ratio range have better adaptability;between the underwater demihull has the beneficial and adverse interference,the use of k-ε two equation onflow model to calculate the disturbance of the two demihulls is feasible. |
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| Keywords: | numerical simulation onflow intensity |
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