0407 Visualization of free jet with BOS method using colored grid back ground pattern containing two frequency components

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  • 0407 2周波数成分を持つカラーグリッド背景を用いたBOS法による超音速自由噴流の可視化(OS4 Background-Oriented Schlieren法による可視化計測,オーガナイズドセッション)

Abstract

A Background Oriented Schlieren (BOS) technique using a periodic background image containing multiple frequency components has been developed by the authors, and "phase reversal problem", which is specific problem for BOS method using a periodic pattern, has been resolved. But the displacement detection by the method was restricted to one direction. In this study, we have extended this method to detect two-dimensional displacement using a colored grid in the background. We have evaluated its effectiveness by making visualization of supersonic free jet.

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