Numerical Analysis of Flow Characteristics around Circular Cylinders with Arc Grooves(SCHOOL OF ENGINEERING)
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概要
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In this study, the drag reduction by arc grooves on a circular cylinder is investigated. Thirty-two arc grooves are formed on the cylinder surface, and three cylinders with different arc groove depths are used. The critical Reynolds numbers of the circular cylinders with grooves are smaller than that of a smooth cylinder The flow characteristics around the circular cylinders with grooves are numerically analyzed using the Reynolds number Re=1.2×10^5. The results of this numerical analysis revealed that separation bubbles are generated inside the grooves. The separation bubbles transform a laminar boundary layer into a turbulent boundary layer. Therefore, the drag coefficients of circular cylinders with grooves are smaller than that of the smooth cylinder.
- 東海大学の論文
著者
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Aoki Katsumi
Department Of Mechanical Engineering
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Takayama Shinichi
Course Of Mechanical Engineering
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