Flowfield Investigation of the Effect of Rib Open Area Ratio in a Rectangular DuctSource: Journal of Fluids Engineering:;1998:;volume( 120 ):;issue: 003::page 504DOI: 10.1115/1.2820691Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The spatially periodic turbulent fluid flows and friction in a rectangular passage of width-to-height ratio of 4:1 with perforated rectangular ribs mounted on one wall have been studied using laser Doppler velocimetry and pressure probing. The parameters fixed were rib height to duct hydraulic diameter ratio of 0.106, rib width-to-height ratio of 0.76, rib pitch-to-height ratio of 10, and Reynolds number of 2 × 104 , while the main parameter investigated was the rib open-area ratio (β) with values of 0%, 10%, 22%, 38%, and 44%. Two critical ranges of β and three characteristic flow regimes were identified, which provides useful references of practical tests of computational models. The results also showed that the dominant fluid dynamic factors responsible for the reported peak values of local Nusselt number distribution could be recognized. Moreover, the secondary-flow mean velocity components were found to be one to two orders of magnitude smaller than the bulk mean velocity.
keyword(s): Ducts , Flow (Dynamics) , Friction , Fluids , Turbulence , Reynolds number , Laser Doppler anemometry , Pressure AND Fluid dynamics ,
|
Collections
Show full item record
contributor author | Tong-Miin Liou | |
contributor author | Chih-Wen Kao | |
contributor author | Shih-Hui Chen | |
date accessioned | 2017-05-08T23:56:55Z | |
date available | 2017-05-08T23:56:55Z | |
date copyright | September, 1998 | |
date issued | 1998 | |
identifier issn | 0098-2202 | |
identifier other | JFEGA4-27132#504_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/120610 | |
description abstract | The spatially periodic turbulent fluid flows and friction in a rectangular passage of width-to-height ratio of 4:1 with perforated rectangular ribs mounted on one wall have been studied using laser Doppler velocimetry and pressure probing. The parameters fixed were rib height to duct hydraulic diameter ratio of 0.106, rib width-to-height ratio of 0.76, rib pitch-to-height ratio of 10, and Reynolds number of 2 × 104 , while the main parameter investigated was the rib open-area ratio (β) with values of 0%, 10%, 22%, 38%, and 44%. Two critical ranges of β and three characteristic flow regimes were identified, which provides useful references of practical tests of computational models. The results also showed that the dominant fluid dynamic factors responsible for the reported peak values of local Nusselt number distribution could be recognized. Moreover, the secondary-flow mean velocity components were found to be one to two orders of magnitude smaller than the bulk mean velocity. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Flowfield Investigation of the Effect of Rib Open Area Ratio in a Rectangular Duct | |
type | Journal Paper | |
journal volume | 120 | |
journal issue | 3 | |
journal title | Journal of Fluids Engineering | |
identifier doi | 10.1115/1.2820691 | |
journal fristpage | 504 | |
journal lastpage | 512 | |
identifier eissn | 1528-901X | |
keywords | Ducts | |
keywords | Flow (Dynamics) | |
keywords | Friction | |
keywords | Fluids | |
keywords | Turbulence | |
keywords | Reynolds number | |
keywords | Laser Doppler anemometry | |
keywords | Pressure AND Fluid dynamics | |
tree | Journal of Fluids Engineering:;1998:;volume( 120 ):;issue: 003 | |
contenttype | Fulltext |