NDLI: Experimental measurements on air jets issuing into a coaxial rough pipe

Content Provider	IEEE Xplore Digital Library
Author	Mazarakis, G. Kollias, N. Demetriou, J. Dimitriou, D.
Copyright Year	2011
Description	Author affiliation: J.D. Research Hydrolab, 12 Polykarpou St., Athens, 17123, Greece (Dimitriou, D.) \|\| Dept. of Civil Engineers, National Technical Univ. of Athens, 12 Polykarpou St., 17123, Greece (Mazarakis, G.; Kollias, N.; Demetriou, J.)
Abstract	In this experimental study a number of measurements are presented, analyzed and discussed, concerning incompressible air jets (issuing from circular opening d=25 mm) into coaxial rough pipes (equipped with ring rectangular strips roughness elements on the pipe boundaries, κ×κ with κ=2.5 mm, at distances λ=25−50−100 mm) of internal diameters D=49−138−287 mm, in various combinations among them. The flow is fully turbulent, since the Reynolds numbers at the openings vary between 30,590 and 109,340, while the exit velocities Vo vary between 18.21 m/sec and 69.30 m/sec. A large number of axial velocities u and boundary shear stresses τo are measured, and the flow field structures are qualitatively presented and compared. The authors believe that the results and conclusions of this investigation may be useful to environmental, chemical and fluid mechanics pipe engineers.
Starting Page	5844
Ending Page	5848
File Size	289907
Page Count	5
File Format	PDF
ISBN	9781612847719
e-ISBN	9781612847740
DOI	10.1109/ICMT.2011.6002671
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-26
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Geometry Fluids Fluid flow measurement Air Jets In Pipes Electron tubes Velocity measurement Equations Stress
Content Type	Text
Resource Type	Article

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