有漂浮植物河道水流的雷诺应力研究

Study on flow′s Reynolds stress in ecological watercourse with floating plants

水生植物的种植改变了原先河道的水流结构,影响了水体的水流特性.通过室内试验,分析了在河道种植凤眼莲前后水流时均流速和雷诺应力的变化.试验结果表明,凤眼莲对各向时均流速和雷诺应力的分布影响明显,且不同种植方式的影响程度也不同.

The aquatic plants will change the flow structure of a watercourse, and will affect the flow characteristics. Variation of time average velocity and Reynolds stress before and after planting eichhornia crassipe in the watercourse is analyzed based on laboratory experiments. Test results show that the eichhornia crassipe has influences on the time average velocity and Reynolds stress, and different cropping patterns have different influences.