Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Numerical Study on Heat Transfer Characteristics in Impinging Air Jet System

충돌분류시스템의 열전달 특성에 관한 수치적 연구

  • 금성민 (한라대학교 기계공학부) ;
  • 김동춘 (경문대학교 컴퓨터정보기계과)
  • Published : 2003.12.30
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Abstract

Heat transfer characteristics for an air jet vertically impinging on a flat plate with a set of hybrid rods was investigated numerically using the RNG k-$\varepsilon$turbulent model. A commercial finite-volume code FLUENT is used. The rods had cross sections of half circular and rectangular shapes. The heating surface was heated with a constant heat flux value of $1020W/m^2$. Parameters investigated were the jet Reynolds number, nozzle -to-plate spacing, the rod pitch and rod-to-plate clearance. The local and average Nusselt number were found to be dependent on the rod pitch and the clearance because installing rods disturbed the flow. Higher convective heat transfer rate occurred in the whole plate as well as in the wall jet region.

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References

  1. 임태수, 금성민, 이창언, 2차원 충돌분류계에서 사다리힝 로프 배열에 의한 열전달 촉진 효과, 대한기계학회논문집, 2001, B권, 제25권, 11호, pp. 1659-1666
  2. Seyedein, S. H. and Hasan, M. Modclling of a Single Confined Turbulent Slot Jet Impinge-mcnt using Various $\kappa-\varepsilon$ turbul-ence models, Applicd Mathematical Modelling, 1994, Vol. 18, pp. 526-537 https://doi.org/10.1016/0307-904X(94)90138-4
  3. Kleinig, A. R. and Middleberg, A. P. J. Numerical and Experimental Study of a Homogenizer Impinging Jet, AlChE Journal, 1997, Vol. 43, pp. 1100-1107 https://doi.org/10.1002/aic.690430423
  4. 이용차 2차원 충돌분류계에서 열전달증진에 관한연구. 1989. 인하대학교 박사학위논문
  5. Fluent, FLUENT User's Guide, Vols. 1-4, Release 4.4, Fluent, Inc.
  6. Gardon R., et al., Heat Transfer Charact-eristics of Impinging Two-Dimensional Air Jets, J. of Heat Transfer, 1966, Vol. 88, pp. 101-108 https://doi.org/10.1115/1.3691449
  7. Ashfbrth-frost, et al., Velocity and Turbul ence Characteristics of a Semi- Confined Orthogonally Impinging Slot Jet, 10th Symposium on Turbulence Shear Flows, 1995, Vol. 1, pp. 10-1-10-6