Effects of enclosure on the performance of the weak-swirl burner

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This paper reports a study of the velocity and scalar characteristics of the weak-swirl burner in enclosures. WSB utilizes a unique aerodynamic mechanism to stabilize lean burning premixed combustion over a wide range of equivalence ratios ({phi}) and power inputs. As the WSB was developed for fundamental research, previous works focused only on open WSBs. Recent success in adapting the WSB to practical use suggests that a better understanding of the WSB in enclosures is required for further development. Laser Doppler anemometry (LDA), and Mie scattering of oil droplets (MSOD), are used to measure the flame flowfields and flame crossing ... continued below

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12 p.

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Yegian, D.K. & Cheng, R.K. October 1, 1995.

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Description

This paper reports a study of the velocity and scalar characteristics of the weak-swirl burner in enclosures. WSB utilizes a unique aerodynamic mechanism to stabilize lean burning premixed combustion over a wide range of equivalence ratios ({phi}) and power inputs. As the WSB was developed for fundamental research, previous works focused only on open WSBs. Recent success in adapting the WSB to practical use suggests that a better understanding of the WSB in enclosures is required for further development. Laser Doppler anemometry (LDA), and Mie scattering of oil droplets (MSOD), are used to measure the flame flowfields and flame crossing spectra of the WSB with an open flame, enclosed within a quartz cylinder and within a cylinder with a restricted exit. The flame of the enclosed WSB remained extremely stable and did not develop recirculation zones or audible characteristics. The only change observed was a greater divergence of the flowfield upstream of the reaction zone. Neither lengthening the enclosure nor restricting the flow downstream caused any noticeable difference in the operation of the WSB. This work has demonstrated that the WSB should be amenable for adaptation to a wide variety of low NO{sub x} applications.

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12 p.

Notes

OSTI as DE96002555

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  • Fall meeting of the Western States Section of the Combustion Institute, Stanford, CA (United States), 30-31 Oct 1995

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  • Other: DE96002555
  • Report No.: LBL--37900
  • Report No.: CONF-9510145--4
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 135079
  • Archival Resource Key: ark:/67531/metadc618398

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  • October 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • April 4, 2016, 9:18 p.m.

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Yegian, D.K. & Cheng, R.K. Effects of enclosure on the performance of the weak-swirl burner, article, October 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc618398/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.