鹅颈型管道三维水流结构研究

Three-dimensional flow structures in a gooseneck-like pipe

本文通过试验量测了鹅颈型管道水流的三维流速分布 (不同层面和断面的纵向、垂向及横向流速分布 )与断面压力分布 ,剖析了鹅颈型管道的三维水流结构 ,揭示出鹅颈型管道边界分离的特点及二次流 (弯曲二次流及非圆形断面二次流 )的形成机理 ,提出了鹅颈型管道固有的水流型态 。

This paper experimentally investigates three-dimensional velocity and cross-sectional pressure distributions in a gooseneck-like pipe. Three-dimensional flow structures in the pipe were analyzed. Characteristics of boundary-layer separation, and mechanisms of secondary flows due to bending and non-circular cross-section effects in the pipe were examined. The intrinsic flow patterns and hydraulic characteristics in the pipe were also studied. And some related concepts were presented.