有限流动水域浮体结构对水流结构的影响

基于物理模型试验,研究浮体结构在有限流动水域运行过程中对下游水流流动结构产生的影响。在不同浮体结构位置及来流条件下,对下游水流结构特征断面的流速分布、流速不均匀系数以及回流区长度进行了测量分析。结果表明:浮体结构位置对流速分布及流速不均匀系数存在明显影响;来流条件的改变同样对两者有较大的影响,其影响随着来流流量的增大而增大;回流区的长度受浮体结构位置以及来流流量影响都较大。在实际工程中,应重点关注浮体结构位置及来流流量变化引起的水流流动结构改变。

Influence of floating structure on the flow structure of downstream water in finite flowing

The influence of floating structure on the downstream flow structure in the finite flowing was studied by using a physical model test. By comparing the floating structure in different positions and under discharge conditions, the distribution of flow velocity, the non-uniform coefficient and the length of recirculation zone of the characteristic cross section are analyzed. The results show that the influence of floating structure position on the velocity distribution and the non-uniform coefficient is clearly observed, and the discharge condition also has a great influence on them. Besides, this effect shows an increasing trend with the increase of flow discharge. Both different positions and discharges have a significant impact on the length of the recirculation zone. In the practical engineering, attention should be paid to the engineering problems caused by the change of the positions and discharge. The change rule of downstream flow structure of floating structures during the process of running is obtained in this study, which can provide references for the design of floating structural stability.