闸下海漫柔性加糙体消能防冲机理试验  

Experimental study on mechanism of energy dissipation and erosion control of aprons for sluices

作　　者：史国庆[1] 文恒[1] 牟献友[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,内蒙古呼和浩特010018

出　　处：《水利水电科技进展》2011年第5期49-52,共4页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(50169001)

摘　　要：通过室内水工模型试验,量测了采用废旧轮胎加糙后三维流速的分布。结果表明:加糙后近底流速明显降低,但整个断面的平均流速近似相等;随着轮胎排数的增加,水流紊流强度平均值增大,附加切应力增大,流体质点间相互混掺的情况加剧,从而使消能效率得以提高。Based on the laboratory hydraulic model tests,the distribution of three-dimensional velocity after raising the roughness of the aprons by means of scrap tires was measured.The results show that the bottom velocity of water obviously decreases and the average velocity of the whole cross-section is approximately equal.With the increase of the tires,the average turbulence intensity and the additional shear stress and the fluid mixing increase so as to improve the efficiency of energy dissipation.

关 键 词：水闸 消能防冲 海漫加糙 废旧轮胎 紊流强度 附加切应力 

分 类 号：TV653.7[水利工程—水利水电工程]