用PIV测量含淹没刚性植物明渠水流流速场

含植物河道流速的分布很复杂,植物的种类、刚度特性、分布情况以及高度等都将影响到河道水流流速分布.目前,对含有植物明渠流流速分布的研究大多是逐点测得的过流断面上垂线沿流向的纵向流速分布,极少有人对含有植物明渠流的全场流速进行有效的测量研究.为了准确把握含植物河道水流的流速分布,对含植物河道水流进行全场的流速测量显得尤为重要.叙述了采用现代先进的测试手段,用标准PIV测量含淹没刚性植物明渠水流沿流向垂直平面内的流速场分布规律,以期能给人以新的认识.

Measurement of flow field with submerged rigid vegetation by PIV

The velocity distribution of open channel flow with vegetation is very complex. The type of vegetation, stiffness characteristics, as well as the vegetation height, etc. will affect the river flow velocity distribution. At present, containing channel flow velocity distribution of plant research are measured point by point over-current on the vertical section along the longitudinal flow velocity distribution, very few people do effective research on the whole open channel flow velocity with vegetation. In order to accurately grasp the whole velocity field distribution of open channel flow with vegetation is particularly important.This paper describes the use of modern means of advanced test, using a standard particle image velocimetry (PIV) measurements with rigid submerged vegetation along the water channel to the vertical plane of the distribution of velocity field, with a view to give people a new awareness.