文档介绍：517 日本機械学会流体工学部門講演会講演論文集(-8・鳥取市)
Copyright©1999 社団法人日本機械学会
Hierarchical Recursive PIV と噴流解析への応用
Hierarchical Recursive PIV and Its Application on Jet Flow Research
○正胡暉(東大生研) 正佐賀徹雄(東大生研)
正小林敏雄(東大生研) 正谷口伸行(東大生研)
正瀬川茂樹(東大生研)
Hui HU, Tetsuo SAGA, Toshio KOBAYASHI, Nobuyuki TANIGUCHI and Shigeki SEGAWA
Institute of Industrial Science, University of Tokyo, Roppongi 7-22-1, Tokyo 106-8558, Japan
A PIV image processing method, which can get a very high spatial resolution, was described in this paper. By
starting with a large interrogation window size and search distance as the same as normal correlation analysis
based PIV image processing method, a very high-resolution result can be achieved through hierarchical reduction
of the interrogation window size and search distance for next step iteration based on the calculation results of
former step. Such algorithm was used to do PIV imaging processing for the identification of various vortical
structures in the lobed jet mixing flow. It was found that small-scale vortical structures could be revealed clearly
in the jet flow as the spatial resolution of the PIV results increasing. These vortical structures may not be
identified in the flow field by using convention PIV image processing methods with poor spatial resolution
ability.
Key Words : PIV technique, Spatial re