Flow And Heat Transfer Characteristics Of Inclined Jet Impingement On A Flat Plate

Yıl 2020, Cilt: 23 Sayı: 3, 697 - 706, 01.09.2020

Amir Lak Tamer Çalışır Şenol Başkaya

https://doi.org/10.2339/politeknik.543267

Cited By: 2

Öz

The
effects of a turbulent inclined jet impinging on a horizontal flat surface were
investigated numerically with respect to the flow field and heat transfer
characteristics. Main purpose of the study was to show the effects of inclined
jet impingement on flow characteristics, which affects the heat transfer on a
surface with a constant heat flux. Simulations were performed for different
dimensionless jet-to-plate distances (2 < H/D < 8), inclination angle of
the jet (45° < α < 90°), and Reynolds number (1500 < Re < 30000).
The heat transfer and fluid flow characteristics have been discussed using
temperature contours and velocity vectors. Initial simulation results have been
validated with experimental data from the literature, and a fairly good agreement
has been achieved. Results showed that by decreasing the inclination angle, a
decrease in the maximum heat transfer occurs. The ratio of the maximum Nusselt
number to the stagnation Nusselt number increases as the jet angle is
increased. 

Anahtar Kelimeler

Heat transfer, inclined impinging jet, computational fluid dynamics (CFD), turbulence

Flow and Heat Transfer Characteristics of Inclined Jet Impingement on a Flat Plate

Öz

The
effects of a turbulent inclined jet impinging on a horizontal flat surface were
investigated numerically with respect to the flow field and heat transfer
characteristics. Main purpose of the study was to show the effects of inclined
jet impingement on flow characteristics, which affects the heat transfer on a
surface with a constant heat flux. Simulations were performed for different
dimensionless jet-to-plate distances (2 < H/D < 8), inclination angle of
the jet (45° < α < 90°), and Reynolds number (1500 < Re < 30000).
The heat transfer and fluid flow characteristics have been discussed using
temperature contours and velocity vectors. Initial simulation results have been
validated with experimental data from the literature, and a fairly good agreement
has been achieved. Results showed that by decreasing the inclination angle, a
decrease in the maximum heat transfer occurs. The ratio of the maximum Nusselt
number to the stagnation Nusselt number increases as the jet angle is
increased. 

Anahtar Kelimeler

Heat transfer, inclined impinging jet, Computational Fluid Dynamics(CFD), turbulence

Kaynakça

• [1] O’Donovan, T. S., Murray, D. B., Torrance, A. A., “Jet heat transfer in the vicinity of a rotating grinding wheel”, Proc. ImechE Part C: J. Mechanical Engineering Science, 220: 1-11, (2006)
• [2] Martin, H., “Heat and Mass Transfer between Impinging Gas Jets and Solid Surfaces”, Advances in Heat Transfer, 13: 1-60, (1977).
• [3] Viskanta, R., “Heat transfer to impinging isothermal gas and flame jets”, Experimental Thermal and Fluid Science, 6(2): 111-134, (1993)
• [4] Polat, S., Huang, B., Mujumdar, A. S., Douglas, W. J. M., “Numerical Flow and Heat Transfer under Impinging Jets: A Review”, Annual Review of Heat Transfer, 2: 157-197, (1989)
• [5] Lytle, D., Webb, B. W., “Air jet impingement heat transfer at low nozzle-plate spacings”, International Journal of Heat and Mass Transfer, 37(12): 1687-1697, (1994)
• [6] Choo, K. S., Kim, S. J., “Heat transfer charachteristics of impinging air jets under a fixed pumping power condition”, International Journal of Heat and Mass Transfer, 53(1-3): 320-326, (2010)
• [7] O’Donovan, T. S., Murray, D. B., “Fluctuating fluid flow and heat transfer of an obliquely impinging air jet”, International Journal of Heat and Mass Transfer, 51(25-26): 6169-6179, (2008)
• [8] Kilic, M., Calisir, T., Baskaya, S., “Experimental and numerical study of heat transfer from a heated flat plate in a rectangular channel with an impinging air jet”, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 39(1): 329-344, (2017)
• [9] Kilic, M., Calisir, T., Baskaya, S., “Experimental and numerical investigation of vortex promoter effects on heat transfer from heated electronic components in a rectangular channel with an impinging jet”, Heat Transfer Research, 48(5): 435-463, (2017)
• [10] Schueren, S., Hoefler, F., von Wolfersdorf, J., Naik, S., “Heat Transfer in an Oblique Jet Impingement Configuration With Varying Jet Geometries”, Journal of Turbomachinery, 135(2): 021010, (2012)
• [11] Dogruoz, M.B., “Experimental and Numerical Investigation of Turbulent Heat Transfer due to Rectangular Impinging Jets”, Phd. Thesis, University of Arizona, (2005)
• [12] Beitelmal, A. H., Saad, M. A., Patel, C. D., “The effect of inclination on the heat transfer between a flat surface and an impinging two-dimensional air jet”, International Journal of Heat and Fluid Flow, 21(2): 156-163, (2000)
• [13] Yan, X., Saniei, N., “Heat transfer from an obliquely impining circular, air jet to a flat plate”, International Journal of Heat and Fluid Flow, 18(6): 591-599, (1977)
• [14] Akansu, Y. E., Sarioglu, M., Kuvvet, K., Yavuz, T., “Flow field and heat transfer characteristics in an oblique slot jet impinging on a flat plate”, International Communications in Heat and Mass Transfer, 35(7): 873-880, (2008)
• [15] Abdel-Fattah, A., “Numerical and experimental study of turbulent impinging twin-jet flow”, Experimental Thermal and Fluid Science, 31(8): 1061-1072, (2007)
• [16] Al-Hadhrami, L. M., ”Study of Heat Transfer Distribution in a Channel with Inclined Target Surface Cooled by a Single Array of Staggered Impinging Jets”, Heat Transfer Engineering, 31(3): 234-242, (2010)
• [17] Al-Mubarak, A. A., Shaahid, S. M., Al-Hadhrami, L. M., “Impact of Jet Reynolds Number and Feed Channel Geometry on Heat Transfer in a Channel with Inclined Target Surface Cooled by Single Array of Centered Impinging Jets with Outflow in Both Directions”, Proceedings of the World Congress on Engineering 3, London, U.K., (2011)
• [18] Muthukannan, M., Kannan, P. R., Bajpai, A., Jeyakumar, S., “Numerical Investigation on the Fluid Flow Characteristics of a Laminar Slot Jet on Solid Block Mounted on a Horizontal Surface”, Arabian Journal for Science and Engineering, 39(11): 8077-8098, (2014)
• [19] Goldstein, R. J., Behbahani. A. I., Heppelmann, K. K., “Streamwise distribution of the recovery factor and the local heat transfer coefficient to an impinging circular air jet”, International Journal of Heat and Mass Transfer, 29(8): 1227-1235, (1986)
• [20] Lamont, P. J., Hunt, B. L., “The impingement of underexpanded, axisymmetric jets on perpendicular and inclined flat plates”, Journal of Fluid Mechanics, 100(3): 471-511, (1980)
• [21] Rubel, A., “Computations of the Oblique Impingement of Round Jets upon a Plane Wall”, AIAA Journal, 19(7): 863-871, (1981)
• [22] Sparrow, E. M., Lovell, B. J., “Heat Transfer Charachtiristics of an Obliquely Impinging Circular Jet”, Journal of Heat Transfer, 102(2): 202-209, (1980)
• [23] Ward, J., Oladiran, M. T., Hammond, G. P., “Effect of nozzle inclination on jet impingement heat transfer in a confined cross flow”, ASME 91-HTD, 181: 25-31, (1991)
• [24] Isman, M. K., Pulat, E., Etemoglu, A. B., Can, M., “Numerical Investigation of Turbulent Impinging Jet Cooling of a Constant Heat Flux Surface”, Numerical Heat Transfer, Part A: Applications, 53(10): 1109-1132, (2008)
• [25] Wang, T., Lin, M., Bunker, R. S., “Flow and heat transfer of confined impingement jets cooling using a 3-D transient liquid crystal scheme”, International Journal of Heat and Mass Transfer, 48(23-24): 4887-4903, (2005)
• [26] Attalla, M., Salem, M., “Heat transfer from a flat surface to an inclined impinging jet”, Heat and Mass Transfer, 50(7): 915-922, (2014)
• [27] Goldstein, R. J., Franchett, M. E., “Heat Transfer From a Flat Surface to an Oblique Impinging Jet”, Journal of Heat Transfer, 110(1): 84-90, (1988)
• [28] Baughn, J. W., Shimizu, S., “Heat Transfer Measurements From a Surface With Uniform Heat Flux and an Impinging Jet”, Journal of Heat Transfer, 111: 1096-1098, (1989)
• [29] Rubel, A., “Oblique impingement of a round jet on a plane surface”, AIAA Journal, 20: 1756-1758, (1982).
• [30] Geers, L. F. G., “Multiple impinging jet arrays: an experimental study on flow and heat transfer”, Phd. Thesis, Technical University Delft, (2004).