| 不同旋转轴对矩形通道内湍流与换热影响研究 |
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| 引用本文： | 马良栋,张吉礼.不同旋转轴对矩形通道内湍流与换热影响研究[J].大连理工大学学报,2010,50(6):983-989. |
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| 作者姓名： | 马良栋 张吉礼 |
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| 作者单位： | 大连理工大学,土木工程学院,辽宁,大连,116024 |
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| 基金项目： | 中国博士后科学研究基金资助项目(20090461169); 沈阳建筑大学省级重点实验室开放基金资助项目(JN-200903) |
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| 摘 要： | 对旋转矩形通道(横截面的长宽比b/a=2)内湍流流动和换热进行了大涡数值模拟.基于一种具有二阶精度的不协调混合格式(Adams-Bashforth/Crank-Nicholson)对N-S方程进行离散.采用动态亚格子模型对雷诺应力进行了模拟.湍流雷诺数Reτ和普朗特数Pr分别为400和0.71,旋转数Roτ=0～5.分析了管道横截面内平均速度、平均温度以及湍流强度的分布.结果表明,不同的旋转轴对湍流流动和换热有重要的影响,在高旋转数时,湍流结构在稳定侧和非稳定侧均有明显的变化.在相同旋转数下,与矩形通道绕z轴旋转时相比,系统绕y轴旋转的平均换热系数有所增大.
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| 关 键 词： | 旋转 矩形通道 湍流换热 大涡模拟 |
Research on influence of different rotating axes on turbulent flow and heat transfer in a rectangular duct |
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| MA Liangdong,ZHANG Jili.Research on influence of different rotating axes on turbulent flow and heat transfer in a rectangular duct[J].Journal of Dalian University of Technology,2010,50(6):983-989. |
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| Authors: | MA Liangdong ZHANG Jili |
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| Institution: | MA Liang-dong,ZHANG Ji-li(School of Civil Engineering,Dalian University of Technology,Dalian 116024,China) |
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| Abstract: | Turbulent flow and heat transfer in a rectangular duct with cross-sectional aspect ratio b/a =2rotating along its spanwise direction were investigated by large eddy simulation.The unsteady N-S equations were discretized based on the inconsistent fixed scheme(Adams-Bashforth/Crank-Nicholson) with the second-order precision.And the dynamic subgrid-scale model was used to evaluate the Reynolds stresses.The simulations were performed for a Reynolds number of 400,while the Prandtl number(Pr) was assumed to be 0.... |
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| Keywords: | rotation rectangular duct turbulence heat transfer large eddy simulation |
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