DOI QR코드

DOI QR Code

거칠기 위치에 따른 이중관 내의 난류유동

안수환;김경천
An, Su-Hwan;Kim, Gyeong-Cheon

  • 발행 : 1997.07.01

초록

This paper presents the results of a detailed experimental examination of fully developed asymmetric flows between annular tubes with square-ribbed surface roughness. The main emphasis of the research has been on establishing the turbulence structure, particularly in the central region of the channel where the two dissimilar wall flows interact. Measurements have included profiles of time mean velocities, turbulence intensities, turbulent shear stresses, triple velocity correlations, skewness, and flatness. The region of greatest interaction is characterized by strong diffusional transport of turbulent shear stress and kinetic energy from rough toward the smooth wall region, giving rise to an appreciable separation between the planes of zero shear stresses depending on positions of roughness on the walls.

키워드

난류유동;이중동심관;표면거칠기;비대칭도;편평도