Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on the Heat Transfer Enhancement by Trapezoid Rod Arrays in 2-Dimensional Impinging Jet System

2차원 충돌 분류계에서 사다리형 로드 배열에 의한 열전달 촉진 효과

  • 임태수 (인하대학교 산업대학원) ;
  • 금성민 (한라대학교 기계공학부) ;
  • 이창언 (인하대학교 기계.항공자동화공학부)
  • Published : 2001.11.01
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Abstract

The objective of this study was to investigate the characteristics of air flow and heat transfer caused by trapezoid rods array in impinging air jet system. Trapezoid rods have been set up on front of flat plate to act as a turbulence promoter. Local Nusselt numbers were determined as a function of three parameters : (a) the space from re(Is to heating surface(C=1, 2, 4mm), (b) the pitch between each rods(P=30, 40, 50mm), (c) the distance from nozzle exit to flat plate(H/B=2, 6, 10). The measurements were compared with those of the experiment without trapezoid rods. As a result, when rods are installed in front of the impinging palate, the acceleration of the flow and the eddies due to the rods seem to contribute to the heat transfer enhancement. Heat transfer performance was best under the condition of C=1mm and as the pitch is 30mm. The maximum rate of heat transfer augmentation is about 1.9 times greater compared to that without trapezoid rods.

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References

  1. Carlo, C., 1999, 'An Experimental Investigation on Air Impinging Jets Using Visualization Method,' In. J. Thermal Science, Vol. 38, pp. 808-818 https://doi.org/10.1016/S1290-0729(99)80036-2
  2. Lee, J. H. and Lee, S. J., 2000, 'The Effect of Nozzle Aspect Ratio on Stagnation Region Heat Transfer Characteristics of Elliptic Impinging Jet,' Int. J Heat and Mass Transfer, Vol. 43, pp. 55 5 -575 https://doi.org/10.1016/S0017-9310(99)00167-2
  3. Gau, C. and Lee, I. C., 2000, 'Flow and Impingement Cooling Heat Transfer along Triangular Rib-Roughened Walls,' Int. J. Heat and Mass Transfer, Vol. 43, pp. 4405 -4418 https://doi.org/10.1016/S0017-9310(00)00064-8
  4. Popiel, C. O. and Boguslawski, L., 1986, 'Heat Transfer from a Rotating Disk in an Impinging Round Jet,' ASME J. Heat Transfer, Vol. 108, pp. 357 - 364
  5. Khan, M. M., 笠木伸英, 平田賢, 1980, '衝突噴流熱傅達の增進技術に關する硏究(第2報),' 第18回日本傳熱シソポヅウム講演論文集, pp. 37-39
  6. 금성민, 정동수, 김종보, 1998, 'MESH에 의한 열전달 증진에 관한 연구,' 대한기계학회논문집 B권, 제22권, 제5호, pp. 716-724
  7. 김상필, 1987, '衝突空氣噴流의 熱傳達增進에 關한 實驗的 硏究,' 인하대학교 박사학위논문
  8. 박성수, 1993, '旋回衝突噴流의 熱傳達 增進에 關한 硏究,' 인하대학교 박사학위논문
  9. 이용화, 1989, '2次元 衝突噴流系에서의 熱傳達增進技術에 關한 硏究,' 인하대학교 박사학위논문
  10. Kum, S. M., Gawaguchi, Y. and Seo, J. Y, 1995, 'A Study on Heat Transfer Enhancement by a Square-Rod Array in an Impinging Jet System,' Heat Transfer Japanese Res. 24(2), pp. 193-207
  11. 琴聲民, 1994, '衝突技術噴流 熱傳達의 增進技術에 關한 硏究,' 인하대학교 박사학위논문
  12. Incropera, F. P., 2000, Introduction to Heat Transfer, John Wiley & Sons
  13. Goldstein, R. J. and Timmers, J. F., 1982, 'Visualization of Heat Transfer from Arrays of Impinging Jet,' Int. J Heat Mass Transfer, Vol. 25, pp. 1857-1868 https://doi.org/10.1016/0017-9310(82)90108-9
  14. Gau, C. and Chung, C. M., 1991, 'Surface Curvature Effect on Slot-Air-Jet Impingement Cooling Flow and Heat Transfer Process,' ASME J of Heat Transfer, Vol. 113, pp. 858-864
  15. 최두섭, 1992, '一次元 衝突噴流系에서의 亂流促進體에 의한 傳熱增進에 관한 연구,' 인하대학교 석사학위논문