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http://dx.doi.org/10.5855/ENERGY.2012.21.2.187

Thermal Flow Characteristics of Impinging Air Jet by Shape of Turbulence Promoter  

Kum, Sungmin (School of Mechanical and Automotive Engineering, Halla University)
Jho, Shigie (School of Mechanical and Automotive Engineering, Halla University)
Yu, Byeonghun (School of Mechanical Engineering, Inha University)
Lee, Seungro (School of Mechanical Engineering, Inha University)
Publication Information
Journal of Energy Engineering / v.21, no.2, 2012 , pp. 187-193 More about this Journal
Abstract
In this study, it was experimentally investigated the effect of the clearances distance between the rod and the impinging plate on characteristics of the thermal flow. For the heat transfer enhancement of wall jet region, the right triangle and the square rods were arranged in front of the impinging plate with various clearance distances. As results, the heat transfer enhancement rate of potential core region at H/B=2 was higher than that of transition region at H/B=10. In this experiment range, the maximum heat transfer enhancement rate was about 46 % higher at the square rod with H/B=2 and C=1mm compared with the flat plate. The heat transfer enhancement rate of the right triangle rod was on average about 3 to 8 % higher than that of the square rod, regardless of the clearance.
Keywords
Turbulence promoter; Wall jet region; Heat transfer enhancement rate;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Gardon, R and Akfirat, J. C., 1966, Heat Transfer Charac teristics of Impinging Two-Dimensional Air Jets, Transa ctions of the ASME, Journal of Heat Transfer, Vol. 88, pp. 101-108.   DOI
2 Viskanta, R., 1993, Heat Transfer to Impinging Isothermal Gas and Flame Jets, Experimental Thermal and Fluid Science, Vol. 6, pp. 111-134.   DOI   ScienceOn
3 이대희, 이준식, 1998, 표면조도를 가지는 오목한 면에 충돌하는 원형제트에 의한 열전달 측정, 1998년도 대한기계학회 추계학술대회논문집, pp. 117-122.
4 한영희, 이계복, 이충구, 2009, 균일한 열유속을 갖는 가열된 평판에 부착된 발포알루미늄에 대한 원형 충돌제트의 열유동 해석, 한국에너지공학, 제18권, 제2호, pp. 108-113.
5 홍성국, 이동현, 김영도, 조형희, 2008, 분사홀에 설치된 난류촉진체에 따른 충돌/유출면에서의 열/물질전달 특성, 유체기계저널, 제11권, 제6호, pp. 24-30.
6 조은선, 나우정, 정진도, 송민근, 이상범, 손승우, 2004, 충돌 Jet에서 Rod 형상에 따른 유동특성의 PIV 계측에 의한 연구, 한국박용기관학회지, 제28권, 제1호, pp. 152-161.   과학기술학회마을
7 김상근, 하만영, 손창민, 2011, 다양한 노즐수 변화에 따른 충돌 제트의 열전달 특성에 관한 수치적 연구, 설비공학논문집, 제23권, 제11호, pp. 754-761.
8 유상필, 진주석, 김학균, 김이현, 정성대, 서용석, 정남조, 2009, 셀 표면의 충동제트를 이용한 태양광발전 시스템 효율향상에 관한 연구, 태양에너지학회 춘계학술발표대회논문집, pp. 241-244.
9 Webb, R. L., Eckert, E. R. G. and Goldstein, R. J., 1971, Heat Transfer and Friction in Tubes with Repeated-Rib Roughness, Int. J. Heat and Mass Transfer, Vol. 14, pp. 601-617.   DOI   ScienceOn
10 Giralt, F., Chia, C. and Trass, O., 1977, Characterization of the Impingement Region in an Axisymmetric Turbulent Jet, Industrial and Engineering Chemistry Fundamentals, Vol. 16, pp. 21-28.   DOI   ScienceOn
11 금성민, 2004, 충돌분류계에서 사다리형로드에 의한 열전달증진 효과, 한국에너지공학, 제13권, 제1호, pp. 28-33.   과학기술학회마을
12 Kline, S, J. and Mcklintock, F. A., 1953, Describing Uncertainties in Single Sample Experiments, Mechanical Engineering, Vol. 75, pp. 3-8.