Axi-asymmetric Character of Turbulent Swirling Flow in a Straight Circular Pipe

抄録

Swirling flow in a pipe usually has some axi-asymmetricity, detail of which has not been clarified. Here, detailed experimental investigations concerning axi-asymmetric characters of velocity distributions and especially eccentricity of swirl center were performed. Small deviation of velocity distribution from symmetry at inlet section causes non-negligible asymmetricity in downstream section. This increase of asymmetricity in downstream section occurs only in some swirl intensity range. In addition to the velocity distributions, axi-asymmetric character of momentum field and wall pressure were also given.