An experimental study of a turbulent vortex ring: a three-dimensional representation
An experimental study of a turbulent vortex ring: a three-dimensional representation
复制标题
湍流涡环的实验研究：三维表示
DOI：
10.1007/s00348-011-1156-5
复制
发表时间：
2011
影响因子：
2.4
通讯作者：
J. Dawson
中科院分区：
文献类型：
--
作者：
L. Gan;T. Nickels;J. Dawson
This paper presents a reconstruction of the three-dimensional velocity field of a turbulent vortex ring by means of Taylor’s hypothesis. Stereoscopic PIV is used to acquire three velocity component information on a plane. The accuracy of the Taylor’s hypothesis for this particular flow pattern is first discussed, and the three-dimensional velocity and vorticity information are then presented. This study also introduces an azimuthally averaging method in order to give a mean structure in cylindrical coordinates from a single realization and from which turbulent stresses and production can be estimated. The azimuthally averaged quantities are then compared with the ensemble-averaged results from the previous planar (two-dimensional and stereoscopic) PIV experiments.
