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contributor authorTong-Miin Liou
contributor authorChin-Chun Liao
contributor authorShih-Hui Chen
contributor authorHsin-Ming Lin
date accessioned2017-05-08T23:59:59Z
date available2017-05-08T23:59:59Z
date copyrightSeptember, 1999
date issued1999
identifier issn0098-2202
identifier otherJFEGA4-27142#580_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/122322
description abstractTurbulent 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.
publisherThe American Society of Mechanical Engineers (ASME)
titleStudy on Side-Jet Injection Near a Duct Entry With Various Injection Angles
typeJournal Paper
journal volume121
journal issue3
journal titleJournal of Fluids Engineering
identifier doi10.1115/1.2823508
journal fristpage580
journal lastpage587
identifier eissn1528-901X
keywordsDucts
keywordsFlow (Dynamics)
keywordsReynolds number
keywordsStress
keywordsFlow visualization
keywordsComputation
keywordsFluids
keywordsLasers
keywordsMeasurement
keywordsTurbulence AND Density
treeJournal of Fluids Engineering:;1999:;volume( 121 ):;issue: 003
contenttypeFulltext


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