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Heat Transfer Enhancement in Turbulent Flows by Blocked Surfaces

Year 2013, Volume: 18 Issue: 1, 61 - 67, 01.04.2013

Onur Yemenici Z. Abidin Fıratoğlu

Abstract

In this study, the heat transfer analyses over flat and blocked surfaces were carried out in turbulent flow under the influence of the block height. A constant-temperature hot wire anemometer was used to the velocity and turbulent intensity measurements, while temperature values were measured by copper-constantan thermocouples. The average Stanton numbers for block heights of 15 and 25 mm were higher than those of flat surface by %38 and %84, respectively. The results showed that the presence of the blocks increased the heat transfer and the enhancement rose with block heights

Keywords

Blocked surface Turbulent flow Heat transfer enhancement

References

  • Bilen, K. ve Yapıcı, S. (2001) Heat transfer form a surface fitted with rectangular blocks at different orientation angle, Heat and Mass transfer, 38, 649-655.
  • Chen, Y.M. ve Wang, K.C. (1998) Experimental study on the forced convective flow in a channel with heated blocks in tandem, Experimental Thermal and Fluid Science, 16, 286- 298.
  • Kays, W.M. ve Crawford, M.E. (1993) Convective heat and mass transfer, New York: McGraw Hill.
  • Kim, S.H. ve Anand, N.K. (1994) Turbulent heat transfer between a series of parallel plates with surface-mounted discrete heat sources, Journal of Heat Transfer, 116, 577-587.
  • Kline, S.J. ve McClintock, F.A. (1953) Describing uncertainties in single sample experiments, Mech. Eng., 75, 3-8.
  • Korichi, A. ve Oufer, L. (2006) Heat transfer enhancement in oscillatory flow in channel with periodically upper and lower walls mounted obstacles, International Journal of Heat and Fluid Flow, 52, 1138-1148.
  • Lee, C.K., Abdel-Moneim, S.A. (2001) Computational analysis of heat transfer in turbulent flow past a horizontal surface with two-dimensional ribs, International Communication Heat and Mass Transfer, 28, 161-170.
  • Leung, C.W., Kang H.J. ve Probert, S.D. (1997) Horizontal simulated printed-circuit board assembly in fully-developed laminar-flow convection, Applied Energy, 56, 71-91.
  • Mohammed, M.M. (2006) Air cooling characteristics of a uniform square modules array for electronic device heat sink, Applied Thermal Engineering, 26, 486–493.
  • Morris, G.K. ve Garimella, S.V. (1996) Thermal wake downstream of a three-dimensional obstacle, Experimental Thermal and Fluid Science. 12, 65-74.
  • Naik, S., Probert, S.D. ve Bryden, I.G. (1999) Heat transfer characteristics of shrouded longitudinal ribs in turbulent forced convection, International Journal of Heat and Fluid Flow, 20, 374-384.
  • Perng, S-W ve Wu, H-W. (2008) Numerical investigation of mixed convective heat transfer for unsteady turbulent flow over heated blocks in a horizontal channel, International Journal of Thermal Sciences, 47, 620-632.
  • Ryu, D.N., Choi, D.H. ve Patel, V.C. (2007) Analysis of turbulent flow in channels roughened by two-dimensional ribs and three-dimensional blocks, Part II: Heat transfer, International Journal of Heat and Fluid Flow, 28, 1112-1124.
  • Sara, O.N., Pekdemir T., Yapıcı S. ve Yılmaz M. (2001) Enhancement of heat transfer from a flat surface in a channel flow by attachment of rectangular blocks, International Journal of Energy Research, 25, 563-576.
  • Tsay, Y.-L. ve Cheng, J.-C. (2008) Analysis of convective heat transfer characteristics for a channel containing short multi-boards mounted with heat generating blocks, International Journal of Heat and Mass Transfer, 51, 145–154.
  • Young, T.J. ve Vafai, K. (1998) Convective flow and heat transfer in a channel containing multiple heated obstacles, International Journal of Heat and Mass Transfer, 41, 3279-3298.
  • Makale 19.06.2012 tarihinde alınmış, 19.11.2012 tarihinde düzeltilmiş, 21.11.2012 tarihinde kabul edilmiştir.

Türbülanslı Akışta Isı Transferinin Bloklu Yüzeyler ile Arttırılması

Year 2013, Volume: 18 Issue: 1, 61 - 67, 01.04.2013

Onur Yemenici Z. Abidin Fıratoğlu

Abstract

Bu çalışmada, düz ve bloklu yüzeyler üzerinde türbülanslı akış için ısı transferi analizi blok yüksekliğine bağlı olarak yapılmıştır. Hız ve türbülans yoğunlukları ölçümlerinde sabit sıcaklıklı bir kızgın tel anemometresi kullanılırken, sıcaklık değerleri termal çiftler ile ölçülmüştür. 15 ve 25 mm blok yüksekliklerine sahip bloklu yüzey ortalama Stanton sayılarının, düz yüzey değerlerinden sırasıyla %38 ve %84 daha fazla olduğu tespit edilmiştir. Bu sonuçlar, blokların varlığının ısı transferini önemli derecede arttırdığını ve ısı transferinin blok yüksekliği ile arttığını göstermektedir

Keywords

Bloklu yüzey Türbülanslı akış Isı transferi artırımı

References

  • Bilen, K. ve Yapıcı, S. (2001) Heat transfer form a surface fitted with rectangular blocks at different orientation angle, Heat and Mass transfer, 38, 649-655.
  • Chen, Y.M. ve Wang, K.C. (1998) Experimental study on the forced convective flow in a channel with heated blocks in tandem, Experimental Thermal and Fluid Science, 16, 286- 298.
  • Kays, W.M. ve Crawford, M.E. (1993) Convective heat and mass transfer, New York: McGraw Hill.
  • Kim, S.H. ve Anand, N.K. (1994) Turbulent heat transfer between a series of parallel plates with surface-mounted discrete heat sources, Journal of Heat Transfer, 116, 577-587.
  • Kline, S.J. ve McClintock, F.A. (1953) Describing uncertainties in single sample experiments, Mech. Eng., 75, 3-8.
  • Korichi, A. ve Oufer, L. (2006) Heat transfer enhancement in oscillatory flow in channel with periodically upper and lower walls mounted obstacles, International Journal of Heat and Fluid Flow, 52, 1138-1148.
  • Lee, C.K., Abdel-Moneim, S.A. (2001) Computational analysis of heat transfer in turbulent flow past a horizontal surface with two-dimensional ribs, International Communication Heat and Mass Transfer, 28, 161-170.
  • Leung, C.W., Kang H.J. ve Probert, S.D. (1997) Horizontal simulated printed-circuit board assembly in fully-developed laminar-flow convection, Applied Energy, 56, 71-91.
  • Mohammed, M.M. (2006) Air cooling characteristics of a uniform square modules array for electronic device heat sink, Applied Thermal Engineering, 26, 486–493.
  • Morris, G.K. ve Garimella, S.V. (1996) Thermal wake downstream of a three-dimensional obstacle, Experimental Thermal and Fluid Science. 12, 65-74.
  • Naik, S., Probert, S.D. ve Bryden, I.G. (1999) Heat transfer characteristics of shrouded longitudinal ribs in turbulent forced convection, International Journal of Heat and Fluid Flow, 20, 374-384.
  • Perng, S-W ve Wu, H-W. (2008) Numerical investigation of mixed convective heat transfer for unsteady turbulent flow over heated blocks in a horizontal channel, International Journal of Thermal Sciences, 47, 620-632.
  • Ryu, D.N., Choi, D.H. ve Patel, V.C. (2007) Analysis of turbulent flow in channels roughened by two-dimensional ribs and three-dimensional blocks, Part II: Heat transfer, International Journal of Heat and Fluid Flow, 28, 1112-1124.
  • Sara, O.N., Pekdemir T., Yapıcı S. ve Yılmaz M. (2001) Enhancement of heat transfer from a flat surface in a channel flow by attachment of rectangular blocks, International Journal of Energy Research, 25, 563-576.
  • Tsay, Y.-L. ve Cheng, J.-C. (2008) Analysis of convective heat transfer characteristics for a channel containing short multi-boards mounted with heat generating blocks, International Journal of Heat and Mass Transfer, 51, 145–154.
  • Young, T.J. ve Vafai, K. (1998) Convective flow and heat transfer in a channel containing multiple heated obstacles, International Journal of Heat and Mass Transfer, 41, 3279-3298.
  • Makale 19.06.2012 tarihinde alınmış, 19.11.2012 tarihinde düzeltilmiş, 21.11.2012 tarihinde kabul edilmiştir.
There are 17 citations in total.

Details

Primary Language Turkish
Journal Section Research Articles
Authors

Onur Yemenici This is me

Z. Abidin Fıratoğlu This is me

Publication Date April 1, 2013
Submission Date December 19, 2014
Published in Issue Year 2013 Volume: 18 Issue: 1

Cite

APA Yemenici, O., & Fıratoğlu, Z. A. (2013). Türbülanslı Akışta Isı Transferinin Bloklu Yüzeyler ile Arttırılması. Uludağ Üniversitesi Mühendislik Fakültesi Dergisi, 18(1), 61-67. https://doi.org/10.17482/uujfe.54511
AMA Yemenici O, Fıratoğlu ZA. Türbülanslı Akışta Isı Transferinin Bloklu Yüzeyler ile Arttırılması. UUJFE. April 2013;18(1):61-67. doi:10.17482/uujfe.54511
Chicago Yemenici, Onur, and Z. Abidin Fıratoğlu. “Türbülanslı Akışta Isı Transferinin Bloklu Yüzeyler Ile Arttırılması”. Uludağ Üniversitesi Mühendislik Fakültesi Dergisi 18, no. 1 (April 2013): 61-67. https://doi.org/10.17482/uujfe.54511.
EndNote Yemenici O, Fıratoğlu ZA (April 1, 2013) Türbülanslı Akışta Isı Transferinin Bloklu Yüzeyler ile Arttırılması. Uludağ Üniversitesi Mühendislik Fakültesi Dergisi 18 1 61–67.
IEEE O. Yemenici and Z. A. Fıratoğlu, “Türbülanslı Akışta Isı Transferinin Bloklu Yüzeyler ile Arttırılması”, UUJFE, vol. 18, no. 1, pp. 61–67, 2013, doi: 10.17482/uujfe.54511.
ISNAD Yemenici, Onur - Fıratoğlu, Z. Abidin. “Türbülanslı Akışta Isı Transferinin Bloklu Yüzeyler Ile Arttırılması”. Uludağ Üniversitesi Mühendislik Fakültesi Dergisi 18/1 (April 2013), 61-67. https://doi.org/10.17482/uujfe.54511.
JAMA Yemenici O, Fıratoğlu ZA. Türbülanslı Akışta Isı Transferinin Bloklu Yüzeyler ile Arttırılması. UUJFE. 2013;18:61–67.
MLA Yemenici, Onur and Z. Abidin Fıratoğlu. “Türbülanslı Akışta Isı Transferinin Bloklu Yüzeyler Ile Arttırılması”. Uludağ Üniversitesi Mühendislik Fakültesi Dergisi, vol. 18, no. 1, 2013, pp. 61-67, doi:10.17482/uujfe.54511.
Vancouver Yemenici O, Fıratoğlu ZA. Türbülanslı Akışta Isı Transferinin Bloklu Yüzeyler ile Arttırılması. UUJFE. 2013;18(1):61-7.

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