| 平衡大气边界层的数值模拟和风洞实验 |
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| 引用本文： | 顾明,李孙伟,周印.平衡大气边界层的数值模拟和风洞实验[J].同济大学学报(自然科学版),2009,37(3). |
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| 作者姓名： | 顾明 李孙伟 周印 |
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| 作者单位： | 1. 同济大学土木工程防灾国家重点实验室,上海,200092
2. Risk Management Solutions,Inc.,Newark,California 94560 |
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| 基金项目： | 国家自然科学基金创新群体项目，国家自然科学基金重大研究计划重点项目，国家科技支撑计划 |
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| 摘 要： | 通过了风洞实验和计算流体动力学(CFD)模拟的对比,结果显示CFD模拟风特性剖面与实验结果吻合情况符合工程应用的精度要求,说明CFD模拟的有效性和准确性.在进行与风洞试验对比的数值模拟时,研究了壁面Y+值对模拟结果的影响,说明了数值模拟的准确性需要精细的壁面网格的支持.另外,通过CFD数值模拟无限长风洞构造满足水平均匀性要求的大气边界层流场,模拟结果显示模拟满足水平均匀性要求的大气边界层风剖面与计算风工程中通常使用的风剖面有一定的差异,因此针对此问题需要进一步的研究.
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| 关 键 词： | 计算流体动力学 平衡大气边界层 水平均匀性 风洞实验 |
Numerical and Experimental Studies on Self sustaining Equilibrium Atmosphere Boundary Layer |
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| GU Ming,LI Sunwei and ZHOU Yin.Numerical and Experimental Studies on Self sustaining Equilibrium Atmosphere Boundary Layer[J].Journal of Tongji University(Natural Science),2009,37(3). |
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| Authors: | GU Ming LI Sunwei and ZHOU Yin |
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| Institution: | State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;Risk Management Solutions, Inc., Newark, California 94560, USA |
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| Abstract: | In this study, computational fluid dynamics(CFD) simulation is compared with results from the wind tunnel test. The good agreement of wind profile between simulation and wind tunnel test confirms the validation and precision of the CFD simulation.A comparative study is made of the impact of Y+ on the simulation results between CFD simulation and wind tunnel test.The study reveals that validation of CFD simulation relies on fine grid system near the wall.A numerical experiment which modeled an infinitely long wind tunnel is conducted using CFD and the profile of a self sustaining equilibrium atmosphere boundary layer is obtained.The result shows the simulated wind profile differs from those commonly used in computational wind engineering. Thus, a further study is necessary to analyze the nature of the difference. |
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| Keywords: | computational fluid dynamics equilibrium atmosphere boundary layer horizontal homogeneity wind tunnel test |
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