contributor author | Tong-Miin Liou | |
contributor author | Chin-Chun Liao | |
contributor author | Shih-Hui Chen | |
contributor author | Hsin-Ming Lin | |
date accessioned | 2017-05-08T23:59:59Z | |
date available | 2017-05-08T23:59:59Z | |
date copyright | September, 1999 | |
date issued | 1999 | |
identifier issn | 0098-2202 | |
identifier other | JFEGA4-27142#580_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/122322 | |
description abstract | Turbulent flowfields resulting from an oblique jet injecting from a rectangular side-inlet duct into a rectangular main duct with an aspect ratio 3.75 without a forced crossflow are presented in terms of laser-Doppler velocimetry measurements. The main focuses are the effects of the side-jet angle (θ) and side-jet flow rate (Qs ) on the mass entrainment upstream of side-jet port and the flowfield in the rectangular duct. The side-inlet angles investigated were 30, 45, and 60 deg and Reynolds numbers based on the air density, rectangular duct height and bulk mean velocity were in the range of 7.1 × 103 to 3.6 × 104 corresponding to Qs values of 1 × 103 to 5 × 103 L/min. The present study suggests the presence of a critical side-injection angle θc (30 ≤ θc ≤ 45 deg) above which a recirculation zone appears in the rectangular duct, whereas below which the recirculation zone is absent. For the more tangential angle (θ = 30 deg), almost as much fluid is entrained into the main duct as was injected from the side jet. The mean flow field in the rectangular duct is found to be a weak function of the Reynolds-number for the range of Qs investigated. In addition, a simple linear correlation between the mass entrainment upstream of the side-jet port and side-injection angle is obtained. Complementary flow visualizations and numerical computations with an algebraic Reynolds stress model were also performed. The discrepancies between measured and computed results are documented. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Study on Side-Jet Injection Near a Duct Entry With Various Injection Angles | |
type | Journal Paper | |
journal volume | 121 | |
journal issue | 3 | |
journal title | Journal of Fluids Engineering | |
identifier doi | 10.1115/1.2823508 | |
journal fristpage | 580 | |
journal lastpage | 587 | |
identifier eissn | 1528-901X | |
keywords | Ducts | |
keywords | Flow (Dynamics) | |
keywords | Reynolds number | |
keywords | Stress | |
keywords | Flow visualization | |
keywords | Computation | |
keywords | Fluids | |
keywords | Lasers | |
keywords | Measurement | |
keywords | Turbulence AND Density | |
tree | Journal of Fluids Engineering:;1999:;volume( 121 ):;issue: 003 | |
contenttype | Fulltext | |