DPマッチング法による二次元円柱後流の乱流計測 Turbulence Measurement in a Two-Dimensional Wake of a Cylinder by DP Matching Method
Although the spark tracing method is one of the most classical techniques of flow visualization, the measurement by this technique has been limited to a qualitative observation or to one-dimensional velocity measurement. Recently, the authors of this study have been succeeded in measuring the two-or three-dimensional velocity field by applying the Dynamic Programming matching technique, which has commonly been used in voice recognition, to the images obtained by the spark tracing method. Presently, the well-known turbulent velocity field of a two-dimensional wake of a cylinder has been measured by this technique in order to validate the applicability to the turbulent flow and also to investigate the limit and the necessary condition for the use of this technique. It has been proved that the streamwise components can be measured very accurately but the resolution of the spark images may limit the accuracy of the measurement of the cross-stream velocity components.
- 可視化情報学会誌. Suppl.
可視化情報学会誌. Suppl. 23(1), 225-228, 2003-07-01
The Visualization Society of Japan