11410 捩りの異なる螺旋曲がり管路内の乱流解析(流体工学(2))

概要

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Numerical analysis has been performed for three-dimensional fully developed turbulent flow in a helically curved pipe by using an algebraic Reynolds stress model. It is interesting point whether the present method can predict correctly the complicated turbulent flow in helically curved pipe, or not. In the numerical calculation, an algebraic Reynolds stress model is introduced to predict correctly anisotropic turbulence. Three types of helical pipe with different torsion ratio are selected to calculate in this research. Calculated results of streamwise mean velocity, secondary flow vectors and turbulent intensity are compared with the experimental date in order to examine the validity of the presented method. As a result of this calculation, it was found that the present method could predict reasonably the streamwise velocity, i.e., the movement of maximum mean velocity from outer wall to inner wall with increasing torsion ratio is reproduced correctly by the presented method. As for the turbulent intensity, the presented method is able to predict characteristic features of its distribution qualitatively but has tendency to underestimate the experimental results.
一般社団法人日本機械学会の論文
2007-03-15