| 过渡粗糙平板紊流边界层统计特性试验研究 |
| |
| 引用本文： | 王晋军,董曾南.过渡粗糙平板紊流边界层统计特性试验研究[J].水科学进展,1991,2(2):73-80. |
| |
| 作者姓名： | 王晋军 董曾南 |
| |
| 作者单位： | 1.北京航空航天大学流体力学研究所; |
| |
| 基金项目： | 国家自然科学基金资助项目 |
| |
| 摘 要： | 本文应用偏振差动式激光测速仪对过渡粗糙平板紊流边界层的统计特性进行了研究,得到紊动强度、紊动流速的三阶矩、四阶矩、概率密度分布形式、功率谱、自相关系数等特征.分析结果表明,可以根据高阶矩的符号对紊流边界层沿垂向进行分区,并给出了分区标准,同时发现,加糙可使边界层紊流趋于均匀和各向同性,即概率密度分布更接近于高斯分布.
|
| 关 键 词： | 边界层 紊流 试验 大糙度 平板 |
| 收稿时间： | 1990-06-09 |
The Statistical Characteristics of the Turbulent Boundary Layer Flow over A Transitional Rough Flat Plate |
| |
| Wang Jinjun,Dong Zengnan.The Statistical Characteristics of the Turbulent Boundary Layer Flow over A Transitional Rough Flat Plate[J].Advances in Water Science,1991,2(2):73-80. |
| |
| Authors: | Wang Jinjun Dong Zengnan |
| |
| Institution: | 1.Beijing University of Aeronautics and Astronautics;2.Tsinghua University |
| |
| Abstract: | The differential LDA system has been used to investigate the statistical characteristics of the turbulent boundary layer flow over a transitional rough flat plate.The characteristical quantities,such as turbulent intensity,third order moment,fourth order moment,probahilitv distrihution,auto-correlation and power spectrum,have been obtained.The experimental results expressed that the turbulent boundary layer car.be divided into subregions in the vertical direction according to the sign of higher order momentum,and the limits of divisions have been given.Meanwhile,it was found that the turbulent boundary layer flow tends to be homogeneous and isotropic owing to the roughness of the flat plate,i.e.,the distribution of probability density is close to Gussian distribution. |
| |
| Keywords: | |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《水科学进展》浏览原始摘要信息 |
| 点击此处可从《水科学进展》下载免费的PDF全文 |
|
