DOI QR코드

DOI QR Code

가열로 내 슬랩의 온도 예측을 위한 2차원 열전달 모델

2D Heat Transfer Model for the Prediction of Temperature of Slab in a Direct-Fired Reheating Furnace

  • 이동은 (포스코 기술연구소 공정제어연구그룹) ;
  • 박해두 (포스코 기술연구소 공정제어연구그룹) ;
  • 김만영 (전북대학교 기계항공시스템공학부, 전북대학교 부설 공학연구원 공업기술연구센터)
  • 발행 : 2006.10.01

초록

A mathematical heat transfer model for the prediction of heat flux on the slab surface and temperature distribution in the slab has been developed by considering the thermal radiation in the furnace and transient conduction governing equations in the slab, respectively. The furnace is modeled as radiating medium with spatially varying temperature and constant absorption coefficient. The slab is moved with constant speed through non-firing, charging, preheating, heating, and soaking zones in the furnace. Radiative heat flux which is calculated from the radiative heat exchange within the furnace modeled using the FVM by considering the effect of furnace wall, slab, and combustion gases is applied as the boundary condition of the transient conduction equation of the slab. Heat transfer characteristics and temperature behavior of the slab is investigated by changing such parameters as absorption coefficient and emissivity of the slab. Comparison with the experimental work shows that the present heat transfer model works well for the prediction of thermal behavior of the slab in the reheating furnace.

키워드

참고문헌

  1. Chapman, K. S., Ramadhyani, S. and Viskanta, R., 1991, 'Modeling and Parametric Studies of Heat Transfer in a Direct-Fired Continuous Reheating Furnace,' Metallurgical Transactions B, Vol. 22B, pp. 513-521 https://doi.org/10.1007/BF02654290
  2. Li, Z., Barr, P. V. and Brimacombe, J. K., 1988, 'Computer Simulation of the Slab Reheating Furnace,' Canadian Metallurgical Quarterly, Vol. 27, No.3, pp. 187-196 https://doi.org/10.1179/cmq.1988.27.3.187
  3. Maki, A. M., Osterman, P. J. and Luomala, M. J., 2002, 'Numerical Study of the Pusher-Type Slab Reheating Furnace,' Scandinavian Journal of Metallurgy, Vol. 31, pp. 81-87 https://doi.org/10.1034/j.1600-0692.2002.310201.x
  4. Kim, J. G. and Huh, K. Y., 2000, 'Prediction of Transient Slab Temperature Distribution in the Reheating Furnace of a Walking-beam Type for Rolling of Steel Slabs,' ISIJ International B, Vol. 40, No. 11, pp. 1115-1123 https://doi.org/10.2355/isijinternational.40.1115
  5. Kang, D.-H., Kim, K.-H. and Lee, Y.-K., 2000, 'Prediction of Billet Temperature by the Total Heat Exchange Factor in the Reheating Furnace,' Trans. of the KSME (B), Vol. 24, No. 11, pp. 1549-1554
  6. Kang, D.-H., Kwag, D.-S., Kim, W.-S. and Lee, Y.K., 2003, 'A Study on the Estimation of One-Dimensional Heat Fluxes on the Slab in Reheating Furnace by Using Inverse Analysis,' Trans. of the KSME (B), Vol. 27, No.1, pp. 61-68 https://doi.org/10.3795/KSME-B.2003.27.1.061
  7. Yang, B. Y., Wu, C. Y., Ho, C. J. and Ho, T.-Y., 1995, 'A Heat Transfer Model for Skidmark Formation on Slab in a Reheating Furnace,' J. of Materials Processing & Manufacturing Science, Vol. 3, pp. 277-295
  8. Byun, D. Y., Baek, S. W. and Kim, M. Y., 2003, 'Investigation of Radiative Heat Transfer in Complex Geometries Using Blocked-Off, Multiblock, and Embedded Boundary Treatments,' Numerical Heat Transfer, Part A, Vol. 43, .pp. 807-825 https://doi.org/10.1080/713838148
  9. Smith, T. F., Shen, Z. F. and Friedman, J. N., 1982, 'Evaluation of Coefficients for the Weighted Sum of Gray Gases Model,' J. of Heat Transfer, Vol. 104, pp. 602-608 https://doi.org/10.1115/1.3245174