Experimental investigations have been made of the wake characteristics of groups of normal flat plates, consisting of two, three, or four plates placed side by side with slits in between. When the ratio of the slit width to the plate width (slit ratio) was small, the gap flows were observed to be biased either upward or downward in a stable way, leading to multiple, stable flow patterns for a single slit ratio value. Some regularities were recognized in the gap flow directions and the appearance of the flow patterns. The plates on the biased side showed high drag and regular vortex shedding, while those on the unbiased side showed the opposite. The variations with slit ratio of base pressure and Strouhal number of the individual plate showed similar tendencies when the neighboring gap flows were alike. In four-plate rows, the wake characteristics were compared with those of two-dimensional perforated plates.
|Number of pages
|Transactions of the Japan Society for Aeronautical and Space Sciences
|Published - May 1983
All Science Journal Classification (ASJC) codes
- Aerospace Engineering