固液两相流下蝶阀的磨损特性研究与结构优化

Wearing Characteristics Study and Structural Optimization of Butterfly Valve under Solid-liquid Two-phase Flow

基于Fluent软件提供的湍流模型与离散相模型,对中线蝶阀内部流场进行了数值模拟研究,考察了阀门开度对蝶阀壁面及蝶板磨损的影响。结果表明,随着阀门开度的减小,蝶阀的磨损量和磨损范围都在增大,其中,蝶板受到的磨损量最大,磨损区域主要集中在蝶板的边缘,而蝶板中心区域的磨损量基本为零。蝶阀内壁面受到的磨损程度与蝶板表面相比较小,磨损范围主要集中在过流截面的两侧。基于研究结果对蝶阀结构进行了优化,优化后蝶阀的磨损程度降低,磨损范围减小,流阻特性改善。

Based on the turbulence model and the discrete phase model provided by Fluent software, the numerical simulation of the internal flow field of the midline butterfly valve was carried out, and the influence of the valve opening on the wear of wall surface of the butterfly valve and the disc was investigated. The results show that as the valve opening decreases, the wearing capacity and wearing range of the butterfly valve increases. Among them, the disc is subjected to the largest wearing capacity, and the wearing area is mainly concentrated on the edge of the disc, and the wearing capacity in the central area of the disc is substantially zero. The inner wall surface of the butterfly valve is less worn than the surface of the disc, and the wear range is mainly concentrated on both sides of the overflowing section. The butterfly valve structure was optimized based on the findings. After optimization, the wear degree of the butterfly valve was reduced, the wearing range was reduced, and the flow resistance performances were improved.