基于河流的修复、河道的管理及水资源可持续发展的理念，从对含植物水流的阻力特性、紊动机理特性研究、水流涡量场及数值模拟研究四个方面开展含植物河道紊动特性的研究。研究结果表明：在非淹没状态、淹没状态、淹没与非淹没状态共存三种情况下，植物增加了河道糙率，对泄洪不利；植物在河道中顶部紊动强度和剪切力最大；含植物河道中水流能量耗散随着涡量值的增加而增加，拟熵也随着涡量值增加而增加。以期为含植物水流的实验与模拟研究提供参考。%Based on the concept of river revival ,riverway management and sustainable development of water resources , the characteristics of turbulence in vegetated open channels was investigated from the aspects of ,resistance characteris-tics ,turbulence mechanism ,vortex field and numerical simulation of the flow in this kind of channels .The research re-sults incicate that under nonsubmerged state ,submerged state and the co-existence of nonsubmerged and submerged state the vegetation increases the roughness of the channel ,which is adverse to the discharging of flood water ;the strength and shear force of the turbulence are maximal at the top of the vegetation ;the flow energy dissipation and entrophy increase with the vorticicty .This study will provide some reference for the experiments and simulations on vegetated flows .
展开▼
