An Experimental Study on Swirling Flow in a 90 Degree Circular Tube by Using Particle Image Velocimetry
Titel:
An Experimental Study on Swirling Flow in a 90 Degree Circular Tube by Using Particle Image Velocimetry
Auteur:
T.H. Chang H.S. Lee
Verschenen in:
Journal of visualization
Paginering:
Jaargang 6 (2004) nr. 4 pagina's 343-352
Jaar:
2004-09-03
Inhoud:
The study of swirl flow is of technical and scientific interest because it has an internal recirculation field, and its tangential velocity is related to the curvature of the streamline. The fluid flow for tubes and elbows of heat exchangers has been studied largely through experiments and numerical methods, but studies about swirl flow have been insufficient. Using the Particle Image Velocimetry method, this study found the time averaged velocity distribution, time averaged turbulence intensity with swirl and without swirl flow for Re = 10,000, 15,000, 20,000 and 25,000 along longitudinal sections, and the results appear to be physically reasonable. In addition, streamwise mean velocity distribution was compared with those of Khodadai et al. and Jeong et al.
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