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| 基于多孔介质模型的土壤风蚀风洞湍流涡发生器设计的数值模拟 | |
| 引用本文： | 高 莹,金陶胜,赵彦琳,姬亚芹,徐让书,吴丽萍.基于多孔介质模型的土壤风蚀风洞湍流涡发生器设计的数值模拟[J].农业工程学报,2011,27(11):85-89. |
| 作者姓名： | 高 莹 金陶胜 赵彦琳 姬亚芹 徐让书 吴丽萍 |
| 作者单位： | 1. 南开大学环境科学与工程学院,国家环境保护城市空气颗粒物污染防治重点实验室,天津300071 2. 沈阳航空航天大学动力与能源工程学院,沈阳,110136 3. 南开大学环境科学与工程学院,国家环境保护城市空气颗粒物污染防治重点实验室,天津300071;天津城市建设学院环境与市政工程系,天津300384 |
| 基金项目： | 环保公益性行业科研专项（200909005） |
| 摘 要： | 该文针对土壤风蚀风洞中设计湍流涡发生器模拟大气边界层的需要，利用计算流体动力学（CFD）软件Fluent对NK-1可移动式风蚀风洞中典型农田风蚀地表风速廓线进行数值模拟，提出引入多孔介质模型的方法将原非规则几何结构的棒栅进行替代计算，最终得到棒栅加粗糙元的最优分布，并通过室内风洞试验进行验证。结果显示，风洞试验实测与模拟所得廓线的相关系数为0.974，模拟效果较理想。该方法使得计算网格数量减少，网格质量提高，节约了模拟成本，提高了计算的精确度和可信度，并且验证了用棒栅-粗糙元组合作为湍流涡发生器来模拟复现大气边界层是可行的，以期为风洞湍流涡发生装置的设计模拟提供一种新的思路和方法。 |
| 关 键 词： | 风洞，湍流，数值方法，风蚀，湍流涡发生器，棒栅-粗糙元，多孔介质模型，Fluent软件 |
| 收稿时间： | 3/6/2011 12:00:00 AM |
| 修稿时间： | 2011/4/15 0:00:00 |
Numerical simulation of vortex-generator design in soil wind erosion tunnel based on porous medium model |
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| Gao Ying,Jin Taosheng,Zhao Yanlin,Ji Yaqin,Xu Rangshu and Wu Liping.Numerical simulation of vortex-generator design in soil wind erosion tunnel based on porous medium model[J].Transactions of the Chinese Society of Agricultural Engineering,2011,27(11):85-89. | |
| Authors: | Gao Ying Jin Taosheng Zhao Yanlin Ji Yaqin Xu Rangshu and Wu Liping |
| Institution: | Gao Ying1,Jin Taosheng1,Zhao Yanlin1,Ji Yaqin1,Xu Rangshu2,Wu Liping1,3(1.State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control,College of Environmental Science and Engineering,Nankai University,Tianjin 300071,China,2.Institute of Aeronautical Engineering,Shenyang Aerospace University,Shenyang 110136,3.Department of Environmental and Municipal Engineering,Tianjin Urban Construction Institute,Tianjin 300384,China) |
| Abstract: | In this paper, Fluent, a kind of CFD (computational fluid dynamics) software, was used to simulate the turbulence flow on typical wind erosion field surface in NK-1 transportable wind tunnel. A new method was introduced in the porous media model to simplify the practical irregular geometric grids of vortex-generator, and then to get the optimal distribution of stick grid-roughness elements. The effectiveness was validated by wind tunnel experiments. The results showed that the correlation coefficient between the profile obtained in wind tunnel and the simulated one was 0.974. In conclusion, the application of the new method can save time and improve the precision in calculation. |
| Keywords: | wind tunnels turbulence numerical methods wind erosion vortex-generator stick grid-roughness element porous media model Fluent |
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