【作者】 朱红钧； 赵振兴； 劳伟； 陈小榆；

【Author】 Zhu Hongjun Petroleum Engineering Istitute,Southwest Petroleum University,Chengdou,610500

【机构】 西南石油大学石油工程学院； 河海大学环境科学与工程学院；

【摘要】 随着河道水环境的每况愈下,生态型河道逐渐成为人们关注的焦点,多种水生植物被用于实际河道的建设,但植被的存在势必破坏了原先河道的水体结构,对水流特性产生一定程度的影响。鉴于漂移植物类研究的缺乏,对具有代表性的凤眼莲进行了室内模拟试验,详细分析其对水流特性的影响。试验采用三维超声波多普勒测速仪对种植前后的明渠水流进行了多工况量测,对比种植前后河道内水流流速分布、紊动强度的变化。结果表明,凤眼莲对河道水流特性影响明显,且不同种植方式的影响程度也不相同。根据试验结果分析,渠道纵向剖面在垂向可分为根茎区、过渡区和半对数分布区三个区域。更多还原

【Abstract】 Water environment is worse and worse,so ecological watercourse becomes attentive emphases and various hydrophyte were used in watercourse’s construction.But the hydrophyte had changed the frame of channel,and influenced the characteristics of flow.Because study on phytoplankton was lack,we use eichhornia crassipe to experiment in laboratory for analyzing the specific influence to flow. Three-dimensional acoustic doppler velocimeter was used to measure velocities in different situations,from which we calculates and contrasts the distribution of velocity, turbulence intensity and Reynolds stress.The result indicates that the influence of eichhomia crassipe is distinctness,and different mode has a diverse effect.Three zones can be divided from the experimental analyses,the rootstock,the transitional and the half logarithm distributing sections.更多还原