Research Papers: Jets, Wakes, and Impingment Cooling

Optimum Jet-to-Plate Spacing of Inline Impingement Heat Transfer for Different Crossflow Schemes

[+] Author and Article Information
Yunfei Xing

State Key Laboratory of High Temperature Gas Dynamics (LHD),
Institute of Mechanics,
Chinese Academy of Sciences,
100190 Beijing, China
e-mail: xingyunfei@imech.ac.cn

Bernhard Weigand

Institut für Thermodynamik der Luft-und Raumfahrt (ITLR),
Universität Stuttgart,
Pfaffenwaldring 31,
70569 Stuttgart, Germany

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received September 26, 2011; final manuscript received January 9, 2013; published online June 17, 2013. Assoc. Editor: Phillip M. Ligrani.

J. Heat Transfer 135(7), 072201 (Jun 17, 2013) (8 pages) Paper No: HT-11-1459; doi: 10.1115/1.4023562 History: Received September 26, 2011; Revised January 09, 2013

A nine-by-nine jet array impinging on a flat plate at Reynolds numbers from 15,000 to 35,000 has been studied by the transient liquid crystal method. The spacing between the impingement plate and target plate is adjusted to be 1, 2, 3, 4, and 5 jet diameters. The effect of jet-to-plate spacing has been investigated for three jet-induced crossflow schemes, referred as minimum, medium, and maximum crossflow, correspondingly. The local air jet temperature is measured at several positions on the impingement plate to account for an appropriate reference temperature of the heat transfer coefficient. The jet-to-plate spacing, H/d = 3, is found to be better than the others for all the crossflow schemes. Jet-to-plate spacings H/d = 1 and H/d = 2 result in a sudden decrease in the stagnation zone. The large jet-to-plate spacings H/d = 4 and H/d = 5 could not provide higher heat transfer performance with higher crossflow.

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Boyce, M. P., 2001, Gas Turbine Engineering Handbook, 2nd ed., Gulf Publishing, Woburn, MA.
Hollworth, B. R., and Berry, R. D., 1978, “Heat Transfer From Arrays of Impinging Jets With Large Jet-to-Jet Spacing,” ASME J. Heat Trans., 100(2), pp. 352–357. [CrossRef]
Metzger, D. E., Florschuetz, L. W., Takeuchi, D. I., Behee, R. D., and Berry, R. A., 1979, “Heat Transfer Characteristics for Inline and Staggered Arrays of Circular Jets With Crossflow of Spent Air,” ASME J. Heat Trans., 101(3), pp. 526–531. [CrossRef]
Andrews, G. E., Asere, A. A., Hussain, C. I., and Mkpadi, M. C., 2005, “Full Coverage Impingement Heat Transfer: The Variation in Pitch to Diameter Ratio at a Constant Gap,” AGARD, CP-390, pp. 26.1–26.12.
Obot, N. T., and Trabold, T. A., 1987, “Impingement Heat Transfer Within Arrays of Circular Jets: Part 1—Effects of Minimum, Intermediate, and Complete Crossflow for Small and Large Spacings,” ASME J. Heat Trans., 109(4), pp. 872–879. [CrossRef]
Van Treuren, K. W., Wang, Z., Ireland, P., Jones, T. V., and Kohler, S. T., 1996, “Comparison and Prediction of Local and Average Heat Transfer Coefficients Under an Array of Inline and Staggered Impinging Jet,” ASME Paper No. 96-GT-163.
San, J. Y., and Lai, M. D., 2001, “Optimum Jet-to-Jet Spacing of Heat Transfer for Staggered Arrays of Impinging Air Jets,” Int. J. Heat Mass Transfer, 44, pp. 3997–4007. [CrossRef]
Garimella, S. V., and Schroeder, V. P., 2001, “Local Heat Transfer Distributions in Confined Multiple Air Jet Impingement,” ASME J. Electron. Packaging, 123(3), pp. 165–172. [CrossRef]
Brevet, P., Dejeu, C., Dorignac, E., Jolly, M., and Vullierme, J. J., 2002, “Heat Transfer to a Row of Impinging Jets in Consideration of Optimization,” Int. J. Heat Mass Transfer, 45, pp. 4191–4200. [CrossRef]
Bailey, J. C., and Bunker, R. S., 2002, “Local Heat Transfer and Flow Distributions for Impinging Jet Arrays of Dense and Sparse Extent,” ASME, Paper No. GT2002-30473. [CrossRef]
Gao, L., 2003, “Effect of Jet Hole Arrays Arrangement on Impingement Heat Transfer,” M.Sc. thesis, Louisiana State University, Baton Rouge, LA.
Dano, B. P. E., Liburdy, J. A., and Kanokjaruvijit, K., 2005, “Flow Characteristics and Heat Transfer Performances of a Semi-Confined Impinging Array of Jets: Effect of Nozzle Geometry,” Int. J. Heat Mass Transfer, 48, pp. 691–701. [CrossRef]
Katti, V., and Prabhu, S. V., 2008, “Influence of Spanwise Pitch on Local Heat Transfer Distribution for In-Line Arrays of Circular Jets With Spent Air Flow in Two Opposite Directions,” Exp. Therm. Fluid Sci., 33, pp. 84–95. [CrossRef]
Geers, L. F. G., Tummers, M. J., Bueniinck, T. J., and Hanjalic, K., 2008, “Heat Transfer Correlation for Hexagonal and In-Line Arrays of Impinging Jets,” Int. J. Heat Mass Transfer, 51, pp. 5389–5399. [CrossRef]
Son, C., Gillespie, D., and Ireland, P., 2000, “Heat Transfer and Flow Characteristics of an Engine Representative Impingement Cooling System,” ASME Paper No. 2000-GT-219.
Park, J., Goodro, M., Ligrani, P., Fox, M., and Moon, H. K., 2007, “Separate Effects of Mach Number and Reynolds Number on Jet Array Impingement Heat Transfer,” ASME J. Turbomach., 129(2), pp. 269–280. [CrossRef]
Xing, Y., Spring, S., and Weigand, B., 2010, “Experimental and Numerical Investigation of Heat Transfer Characteristics of Inline and Staggered Arrays of Impinging Jets,” ASME J. Heat Trans., 132(9), p. 092201. [CrossRef]
Ireland, P. T., and Jones, T. V., 2000, “Liquid Crystal Measurements of Heat Transfer and Surface Shear Stress,” Meas. Sci. Technol., 11, pp. 969–986. [CrossRef]
Kays, W. M., Crawford, M. E., and Weigand, B., 2004, Convective Heat and Mass Transfer, McGraw–Hill International Editions, New York.
Poser, R., von Wolfersdorf, J., and Lutum, E., 2007, “Advanced Evaluation of Transient Heat Transfer Experiments Using Thermochromic Liquid Crystals,” Proc. Inst. Mech. Eng., Part A, 221(6), pp. 793–801. [CrossRef]
Kline, S. J., and McClintock, F. A., 1953, “Describing Uncertainties in Single-Sample Experiments,” J. Mech. Eng., 75, pp. 3–8.
Yan, Y., and Owen, J. M., 2002, “Uncertainties in Transient Heat Transfer Measurements With Liquid Crystal,” Int. J. Heat Fluid Flow, 23, pp. 29–35. [CrossRef]
Kingsley-Rowe, J. R., Lock, G. D., and Owen, J. M., 2005, “Transient Heat Transfer Measurements Using Thermochromic Liquid Crystal: Lateral–Conduction Error,” Int. J. Heat Fluid Flow, 26, pp. 256–263. [CrossRef]
Kercher, D. M., and Tabakoff, W., 1970, “Heat Transfer by a Square Array of Round Air Jets Impinging Perpendicular to a Flat Surface Including the Effect of Spent Air,” ASME J. Eng. Power, 92(1), pp. 73–82. [CrossRef]
El-Gabry, L. A., and Kaminski, D. A., 2005, “Experimental Investigation of Local Heat Transfer Distribution on Smooth and Roughened Surfaces Under an Array of Angled Impinging Jets,” ASME J. Heat Trans., 127(3), pp. 532–544. [CrossRef]
Florschuetz, L. W., Truman, C. R., and Metzger, D. W., 1981, “Streamwise Flow and Heat Transfer Distributions for Jet Array Impingement With Crossflow,” ASME J. Heat Trans., 103(2), pp. 337–342. [CrossRef]


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Fig. 1

Effect of jet-to-plate spacing on area-averaged Nusselt number for inline arrays with different jet-to-jet spacings at a Reynolds number of around 10,000 (numbers in brackets indicate jet-to-jet spacings (X/d, Y/d))

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Fig. 2

Sketch of the experimental setup

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Fig. 3

The impingement model

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Fig. 4

The inline impingement pattern and positions of thermocouples

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Fig. 5

The crossflow schemes

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Fig. 6

Measured temperature evolution of thermocouples

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Fig. 7

Local Nusselt number distribution (maximum crossflow, Re = 35,000)

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Fig. 8

Spanwise-averaged Nusselt number (maximum crossflow, Re = 35,000)

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Fig. 9

Normalized area-averaged Nusselt numbers for maximum crossflow

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Fig. 10

Local Nusselt number distribution (medium crossflow, Re = 35,000)

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Fig. 11

Spanwise-averaged Nusselt number (medium crossflow, Re = 35,000)

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Fig. 12

Area-averaged Nusselt numbers for medium crossflow

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Fig. 13

Local Nusselt number distribution (minimum crossflow, Re = 35,000)

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Fig. 14

Spanwise-averaged Nusselt number (minimum crossflow, Re = 35,000)

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Fig. 15

Area-averaged Nusselt numbers for minimum crossflow

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Fig. 16

Comparison with literature data for the maximum crossflow scheme (bars devote uncertainties of individual measurements)



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