Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Investigation of the Three-Dimensional Turbulent Flow Fields of the Gas Swirl Burner with a Cone Type Baffle Plate(II)

  • Kim, Jang-kweon (Department of Marine Engineering, Kunsan National University)
  • Published : 2001.07.01
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Abstract

This paper presents three-dimensional mean velocities, turbulent intensities and Reynolds shear stresses measured in the Y-Z plane of the gas swirl burner with a cone type baffle plate by using an X-type hot-wire probe. This experiments is carried out at the flow rate of 450ℓ/min which is equivalent to the combustion air flow rate necessary to heat release 15,000 kcal/hr in a gas furnace. Mean velocities and turbulent intensities etc. show that their maximum values exist around the narrow slits situated radially on the edge of and in front of a burner. According to downstream regions, they have a peculiar shape like a starfish because the flows going out of the narrow slits and the swirl vanes of an inclined baffle plate diffuse and develop into inward and outward of a burner. The rotational flow due to the inclined flow velocity going out of swirl vanes of a cone type baffle plate seems to decrease the magnitudes of mean velocities V and W respectively by about 30% smaller than those of mean velocity U. The turbulent intensities have large values of 50%∼210% within the range of 0.5

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References

  1. Aoki K., Nakayama Y. and Wakatsuki M., 1988, 'Study on the Cylindrical Combustor Flow with Swirling Flow (1st Report, Characteristics of Flow Pattern for Swirling Number),' Transactions of JSME (Part B), Vol. 51, No. 468, pp. 2759-2766 (In Japanese)
  2. Aoki K., Shibata M. and Nakayama Y., 1989, 'Study on the Cylindrical Combustor Flow with Swirling Flow (2nd Report, Characteristics of Turbulence for Swirling Number),' Transactions of JSME (Part B), Vol. 52, No. 476, pp. 1617-1625 (In Japanese)
  3. Beer J. M. and Chigier N. A., 1972, Combustion Aerodynamics, Applied Science Publishers, pp. 100-146
  4. Bruun H. H., 1996, Hot-Wire Anemometry, Oxford Science Publications, pp. 132-163
  5. Dantec, 2000, Streamline User's Reference Manual, Chapter 8.3 Algorithms
  6. Ikeda Y., Kawahara N. and Nakayima T., 1995, 'Flux Measurements of $O_2$, $CO_2$ and NO in Oil Furnace,' Transactions of JSME {Part B), Vol. 61, No. 581, pp. 332-338 (In Japanese)
  7. Kihm, K. D., Chigier, N., and Sun, F., 1990, 'Laser Doppler Velocimetry Investigation of Swirler Flowfields,' J. Propulsion, Vol. 6, No. 4, pp. 364-374
  8. Kim, I. K., 1997, 'The Study on Flame Structure and Characteristics of Gun Type Burner for Different Type of Flame Holder,' Master Thesis. Pusan National University, pp. 43-46 (In Korean)
  9. Kim, I. K, Youn, W. H., Ha, M. Y. and Kim, Y. H., 1998, 'The Study on Flow and Combustion Characteristics of Gun-Type Gas Burner,' Proceedings of the KSME Spring Annual Meeting B, pp. 284-289 (In Korean)
  10. Kim, J. K., 2001, 'Investigation of the Three-Dimensional Turbulent Flow Fields of a Gas Swirl Burner with a Cone Type Baffle Plate (I),' KSME International Journal, Vol. 15, No. 7, pp. 895-985
  11. Kim, J. K., Jeong, K. J., Kim, S. W. and Kim, I. K., 2000, 'Investigation of the Three-dimensional Turbulent Flow Fields in Cone Type Gas Burner for Furnace,' Journal of KSPSE, Vol. 4, No. 4, pp. 25-31 (In Korean)
  12. Kim, J. K., 2001, 'An Experimental Study on the Three Dimensional Turbulent Flow Characteristics of Swirl Burner for Gas Furnace,' Transactions of KSME (Part B), Vol. 25, No. 2, pp. 225-234 (In Korean)
  13. Lilley, D. G. and Chigier, N. A., 1971, 'Nonisotropic Turbulent Shear Stress Distribution in Swirling Flows from Mean Value Distributions,' International Journal of Heat and Mass Transfer, Vol. 14, pp. 573-585 https://doi.org/10.1016/0017-9310(71)90007-X
  14. Shigier, N., 1981, Energy, Combustion and Environment, McGraw-Hill, pp. 4-5
  15. Yoon, W. H., 1999, 'The Numerical Study on the Flow and Combustion Characteristics of Gas Swirl Burner,' Master Thesis, Pusan National University, pp. 7-39 (In Korean)