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Transaction of the Visualization Society of Japan
The aerodynamic noise from a two-dimensional symmetrical airfoil was studied experimentally using a low-noise acoustic wind tunnel. The measurement of the sound spectrum at Reynolds number 1.6×10 5 indicates the generation of discrete frequency noise from the airofoil at small incidence angles. The surface flow visualizations over the airofoil were carried out using the oil-film method and the shear-sensitive liquid crystal technique. These visualization results indicate that the reattachmentdoi:10.3154/tvsj.21.123 fatcat:e6cjfhtjivdujokcdbkhncmlu4