Experimental and Numerical Investigation of Impinging Jet Flow in Square Ducts Intersecting at 90 Degrees

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Description

An experimental and numerical investigation has been conducted on flow through two square ducts with a 2:1 hydraulic diameter ratio joined at a right angle. Measurements of the velocity field were acquired using a laser Doppler velocimeter at various planar locations throughout the ducts at a nominal Reynolds number of 68,000. Pressure drop measurements were taken for 3 Reynolds numbers between 46,000 and 93,000. Computational fluid dynamics (CFD) analyses were performed using STAR-CD to determine how well the experimental data could be predicted using the k-{var_epsilon}, k-{var_epsilon} RNG, k-{var_epsilon}Chen, k-{var_epsilon} quadratic, k-{omega}, and Spalart-Allmaras models. The results show that there ... continued below

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16467 Kilobytes pages

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Corson, David & Vassallo, Peter October 20, 2003.

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  • Lockheed Martin
    Publisher Info: Lockheed Martin Corporation, Schenectady, NY 12301 (United States)
    Place of Publication: Schenectady, New York

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Description

An experimental and numerical investigation has been conducted on flow through two square ducts with a 2:1 hydraulic diameter ratio joined at a right angle. Measurements of the velocity field were acquired using a laser Doppler velocimeter at various planar locations throughout the ducts at a nominal Reynolds number of 68,000. Pressure drop measurements were taken for 3 Reynolds numbers between 46,000 and 93,000. Computational fluid dynamics (CFD) analyses were performed using STAR-CD to determine how well the experimental data could be predicted using the k-{var_epsilon}, k-{var_epsilon} RNG, k-{var_epsilon}Chen, k-{var_epsilon} quadratic, k-{omega}, and Spalart-Allmaras models. The results show that there are distinct differences in the CDF results. The standard k-{var_epsilon} model overpredicted the loss coefficient by 4% and underpredicted the exit swirl magnitude by 43%. The best predictor of the swirl decay was found to be the k-{omega} model, which adequately followed the data throughout the entire geometry and underpredicted the exit swirl by 16%. The best overall model was found to be Spalart-Allmaras, which overpredicted the loss coefficient by 2% and underpredicted the exit swirl magnitude by 40%.

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16467 Kilobytes pages

Notes

INIS; OSTI as DE00822274

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  • Other Information: PBD: 20 Oct 2003

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  • Report No.: LM-03K110
  • Grant Number: AC12-00SN39357
  • DOI: 10.2172/822274 | External Link
  • Office of Scientific & Technical Information Report Number: 822274
  • Archival Resource Key: ark:/67531/metadc788285

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  • October 20, 2003

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • April 28, 2016, 8:44 p.m.

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Corson, David & Vassallo, Peter. Experimental and Numerical Investigation of Impinging Jet Flow in Square Ducts Intersecting at 90 Degrees, report, October 20, 2003; Schenectady, New York. (digital.library.unt.edu/ark:/67531/metadc788285/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.