| 丁坝绕流机理及其下游流场的研究 |
| |
| 引用本文： | 陆永军,周耀庭.丁坝绕流机理及其下游流场的研究[J].河海大学学报(自然科学版),1990(1). |
| |
| 作者姓名： | 陆永军 周耀庭 |
| |
| 作者单位： | 河海大学水利水电科学研究所，河海大学水利水电科学研究所 |
| |
| 摘 要： | 本文分析了丁坝绕流机理,建立了二维流动模式.前人的研究及作者的试验资料均表明,丁坝下游流速分布呈自相似性.根据相似原理,Reynolds方程可转化为常微分方程,求解常微分方程得到二维湍流时均流场的相似解.宽浅明槽中的试验表明,该相似解所得结果与实测值比较吻合.此外,本文还对紊动粘性系数沿水流方向的变化作了简要探讨.
|
| 关 键 词： | 丁坝 绕流机理 自相似性 Reynolds方程 流场 |
Study on Flow Mechanism and Velocity Field Near Groin-Like Structure |
| |
| Lu Yongjun, Zhou Yaoting Res. Inst. Water Resources and Hydro-electric Pouer,Hohal Univ..Study on Flow Mechanism and Velocity Field Near Groin-Like Structure[J].Journal of Hohai University (Natural Sciences ),1990(1). |
| |
| Authors: | Lu Yongjun Zhou Yaoting Res Inst Water Resources and Hydro-electric Pouer Hohal Univ |
| |
| Abstract: | The flow mechanism near groin-like structures is analyzed and a two-dimensional model is established in this paper. The velocity distribution behind groin-like structures is found to be self-presering in character. Hence, the Reynolds equation can be transformed into an ordinary differential equation by similarity considerations, and the equation of velocity distribution behind the groin-like structure can be obtained. The values by obtained with the deriver equation are in good agreement with measured ones. In addition, the turbulent viscosity along the main flow direction is briefly investigated. |
| |
| Keywords: | groin-like structure flow mechanism self-preservations Reynolds equation velocity field |
| 本文献已被 CNKI 等数据库收录！ |
