Experimental studies of flow characteristics in corrugated ducts
| Autor: | Besir Sahin, Nehir Tokgöz |
|---|---|
| Přispěvatelé: | Çukurova Üniversitesi |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
020209 energy General Chemical Engineering Heat transfer enhancement 02 engineering and technology Wake 01 natural sciences Physics::Fluid Dynamics symbols.namesake 0202 electrical engineering electronic engineering information engineering Turbulence Momentum transfer Reynolds number Mechanics Vorticity Condensed Matter Physics Atomic and Molecular Physics and Optics 010406 physical chemistry 0104 chemical sciences PIV Phase angle Particle image velocimetry Turbulence kinetic energy Heat transfer symbols Corrugated duct |
| Zdroj: | International Communications in Heat and Mass Transfer. 104:41-50 |
| ISSN: | 0735-1933 |
| Popis: | Structures of flow in a corrugated duct were experimentally examined employing the technique of Particle Image Velocimetry (PIV). The aspect ratio of the corrugated channel was selected as 0.3. Understanding the influences of phase shift, ? on the flow behavior and augmentation of heat transfer is one of the main objectives of this experimental work. Therefore, two different phase shifts such as ? = 0 o and 90 o and two different Reynolds Numbers, Re of 2 × 10 3 and 6 × 10 3 have been investigated for the available corrugated channel. In order to obtain the physics of the flow characteristics of the corrugated channel, the Turbulence Kinetic Energy, TKE, vorticity, and time-average velocity contours were calculated for both Reynold numbers, Re and phase shifts, ?. The experimental results revealed that transporting energy and increasing of momentum transfer by corrugated channel caused a better augmentation of the heat transfer rate for both phase shıft angles than the smooth channel. It appears that the turbulence generated by the sharp corner of the corrugated channels is the most influential factor in increasıng the entrainment between wake and core flows. © 2019 MMF 2012D17 The authors would like to acknowledge the funding of the Research Projects Office of Cukurova University under contract No: MMF 2012D17 . |
| Databáze: | OpenAIRE |
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