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Research Papers

Heat Transfer and Friction Measurement in Pin-Fin Arrays Under Mist Flow Condition

[+] Author and Article Information
Szu-Kai Wang

Department of Mechanical Engineering,
National Chiao Tung University,
Hsinchu 30010, Taiwan, China
e-mail: xc198891@yahoo.com.tw

Yao-Hsien Liu

Department of Mechanical Engineering,
National Chiao Tung University,
Hsinchu 30010, Taiwan, China
e-mail: yhliu@mail.nctu.edu.tw

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received March 1, 2018; final manuscript received September 25, 2018; published online December 5, 2018. Assoc. Editor: Ayyoub M. Momen.

J. Thermal Sci. Eng. Appl 11(2), 021012 (Dec 05, 2018) (10 pages) Paper No: TSEA-18-1112; doi: 10.1115/1.4041635 History: Received March 01, 2018; Revised September 25, 2018

Effects of air/water mist flow on endwall heat transfer in a square channel were experimentally investigated using infrared thermography. The purpose was to study the detailed heat transfer contour variation caused by the generation of the liquid films. The surface was roughened with staggered partial pin-fin arrays to enhance flow mixing and liquid entrainment. Two streamwise spacings (Xp/d = 3 and 6) of the fin array were investigated. The gas Reynolds number ranged from 7900 to 24,000. The calculated droplet deposition velocity was comparable to the literature results and was not substantially affected by the gas Reynolds number or fin spacing. For the pin-fin array, heat transfer was dominated by the water accumulation and liquid film formation, which was dependent on the carrier gas flow rate and fin spacing. Furthermore, thick liquid fragments entrained between the fins substantially enhanced local convective heat transfer coefficients. The average heat transfer enhancement on the finned surfaces using mist flow was four times as high as the air flow. The pressure drop from the mist flow was two times as high as the air flow.

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References

Metzger, D. E. , Berry, R. A. , and Bronson, J. P. , 1982, “ Developing Heat Transfer in Rectangular Ducts With Staggered Arrays of Short Pin-Fins,” ASME J. Heat Transfer, 104(4), pp. 700–706.
Arora, S. C. , and Abdel-Messeh, W. , 1990, “ Characteristics of Partial Length Circular Pin Fins as Heat Transfer Augmentors for Airfoil Internal Cooling Passages,” ASME J. Turbomach., 112(3), pp. 559–565.
Jubran, B. A. , Hamdan, M. A. , and Abdualh, R. M. , 1993, “ Enhanced Heat Transfer Missing Pin and Optimization for Cylindrical Pin Fin Arrays,” ASME J. Heat Transfer, 115(3), pp. 576–583.
Sara, O. N. , 2003, “ Performance Analysis of Rectangular Ducts With Staggered Square Pin Fins,” Energy Convers. Manage., 44(11), pp. 1787–1803.
Matsumoto, R. , Kikkawa, S. , and Senda, M. , 1997, “ Effect of Pin Fin Arrangement on Endwall Heat Transfer,” JSME Int. J. Ser. B Fluids Therm. Eng., 40(1), pp. 142–151.
Chyu, M. K. , Yen, C. H. , and Ma, W. , 1999, “ Effects of Flow Gap Atop Pin Elements on the Heat Transfer From Pin Fin Arrays,” ASME Paper No. 99-GT-47.
Chang, S. W. , Yang, T. Y. , Huang, C. C. , and Chiang, K. F. , 2008, “ Endwall Heat Transfer and Pressure Drop in Rectangular Channels With Attached and Detached Circular Pin-Fin Array,” Int. J. Heat Mass Transfer, 51(21–22), pp. 5247–5259.
Indi, A. , Prabhu, S. V. , and Vedula, R. P. , 2011, “ Local Heat Transfer Distribution in a Rectangular Pin Channel With and Without Vortex Generators,” Exp. Heat Transfer, 24(1), pp. 34–58.
Lawson, S. A. , Thrift, A. A. , Thole, K. A. , and Kohli, A. , 2011, “ Heat Transfer From Multiple Row Arrays of Low Aspect Ratio Pin Fins,” Int. J. Heat Mass Transfer, 54(17–18), pp. 4099–4109.
Moon, M. A. , Husain, A. , and Kim, K. Y. , 2012, “ Multi-Objective Optimization of a Rotating Cooling Channel With Staggered Pin-Fins for Heat Transfer Augmentation,” Int. J. Numer. Methods Fluids, 68(7), pp. 922–938.
Şahin, B. , Akkoca, A. , Öztürk, N. A. , and Akilli, H. , 2006, “ Investigations of Flow Characteristics in a Plate Fin and Tube Heat Exchanger Model Composed of Single Cylinder,” Int. J. Heat Fluid Flow, 27(3), pp. 522–530.
Ostanek, J. K. , and Thole, K. A. , 2012, “ Flowfield Measurements in a Single Row of Low Aspect Ratio Pin Fins,” ASME J. Turbomach., 134(5), p. 051034.
Strasser, W. , and Battaglia, F. , 2016, “ Identification of Pulsation Mechanism in a Transonic Three-Stream Airblast Injector,” ASME J. Fluids Eng., 138(11), p. 111303.
Toda, S. , 1974, “ A Study of Mist Cooling: Theory of Mist Cooling and Its Fundamental Experiments,” Heat Transfer - Jpn. Res., 3(1), pp. 1–44.
Aihara, T. , Taga, M. , and Haraguchi, T. , 1979, “ Heat Transfer From a Uniform Heat Flux Wedge in Air-Water Mist Flows,” Int. J. Heat Mass Transfer, 22(1), pp. 51–60.
Lee, S. L. , Yang, Z. H. , and Hsyua, Y. , 1994, “ Cooling of a Heated Surface by Mist Flow,” ASME J. Heat Transfer, 116(1), pp. 167–172.
Lee, S. , Park, J. , Lee, P. , and Kim, M. , 2005, “ Heat Transfer Characteristics During Mist Cooling on a Heated Cylinder,” Heat Transfer Eng., 26(8), pp. 24–31.
Novak, V. , Sadowski, D. L. , Schoonover, K. G. , Shin, S. , Abdel-Khalik, S. I. , and Ghiaasiaan, S. M. , 2008, “ Heat Transfer in Two-Component Internal Mist Cooling—Part I: Experimental Investigation,” Nucl. Eng. Des., 238(9), pp. 2341–2350.
Nada, S. A. , 2017, “ Experimental Investigation and Empirical Correlations of Heat Transfer in Different Regimes of Air–Water Two-Phase Flow in a Horizontal Tube,” ASME J. Therm. Sci. Eng. Appl., 9(2), p. 021004.
Wataru, N. , Heikichi, K. , and Shigeki, H. , 1988, “ Heat Transfer From Tube Banks to Air/Water Mist Flow,” Int. J. Heat Mass Transfer, 31(2), pp. 449–460.
Hayashi, Y. , Takimoto, A. , Matsuda, O. , and Kitagawa, T. , 1990, “ Study on Mist Cooling for Heat Exchanger,” JSME Int. J., 33(2), pp. 333–339.
Hayashi, Y. , Takimoto, A. , and Matsuda, O. , 1991, “ Heat Transfer From Tubes in Mist Flows,” Exp. Heat Transfer, 4(4), pp. 291–308.
Alhajeri, H. M. , Teixeira, J. A. , Addali, A. , A., Gamil , A. A. , A. , and Alenezi, A. H. , 2016, “ Mist Cooling Ratios Analysis in Rectangular Passage With 45-Deg Angled Rib,” AIAA Paper No. 2016-0240.
Yadav, A. K. , Sharma, P. , Sharma, A. K. , Modak, M. , Nirgude, V. , and Sahu, S. K. , 2017, “ Heat Transfer Characteristics of Downward Facing Hot Horizontal Surfaces Using Mist Jet Impingement,” ASME Paper No. ICONE25-67537.
Ragab, R. , and Wang, T. , 2018, “ An Experimental Study of Mist/Air Film Cooling With Fan-Shaped Holes on an Extended Flat Plate—Part 1: Heat Transfer,” ASME J. Heat Transfer, 140(4), p. 042201.
Ragab, R. , and Wang, T. , 2018, “ An Experimental Study of Mist/Air Film Cooling With Fan-Shaped Holes on an Extended Flat Plate—Part II: Two-Phase Flow Measurements and Droplet Dynamics,” ASME J. Heat Transfer, 140(4), p. 042202.
Kumaran, K. , and Sadr, R. , 2012, “ Spray Characterization of Gas-to-Liquid Synthetic Aviation Fuels,” 12th Triennial International Conference on Liquid Atomization and Spray Systems (ICLASS), Heidelberg, Germany, Sept. 2–6, pp. 1–8. http://www.ilasseurope.org/ICLASS/iclass2012_Heidelberg/Contributions/Paper-pdfs/Contribution1198_b.pdf
Moffat, R. J. , 1988, “ Describing the Uncertainties in Experimental Results,” Exp. Therm. Fluid Sci., 1(1), pp. 3–17.
Šefko, Š. , and Edin, B. , 2015, “ Analysis of Droplet Deposition in a Vertical Air-Water Dispersed Flow,” Procedia Eng., 100, pp. 105–114.
Guha, A. , 2008, “ Transport and Deposition of Particles in Turbulent and Laminar Flow,” Annu. Rev. Fluid Mech., 40(1), pp. 311–341.
Liu, B. Y. H. , and Agarwal, J. K. , 1974, “ Experimental Observations of Aerosol Deposition in Turbulent Flow,” J. Aerosol Sci., 5(2), pp. 145–155.
Huang, Y. H. , Chen, C. H. , and Liu, Y. H. , 2017, “ Nonboiling Heat Transfer of Air/Water Mist Flow in a Square Duct With Orthogonal Ribs,” ASME J. Therm. Sci. Eng. Appl., 9(4), p. 041014.

Figures

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Fig. 1

Schematic diagram of the experimental setup

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Fig. 2

Drawing of the test channel

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Fig. 3

Configuration of the pin-fin array (Xp/d = 6)

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Fig. 4

Calibration of infrared camera

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Fig. 5

Thermal resistance model

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Fig. 6

Heat loss measurement

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Fig. 7

Nusselt number distribution for the air flow

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Fig. 8

(a) Conceptual view of the mist flow and (b) the images of the liquid fragments

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Fig. 9

The droplet deposition velocity with the relaxation time

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Fig. 10

Nusselt number distribution for mist flow

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Fig. 11

Enhancement ratio of mist flow cooling

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Fig. 12

Spanwise-averaged Nusselt number

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Fig. 13

Overall-averaged Nusselt number

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Fig. 14

Overall enhancement ratio of air/water mist flow over air only flow

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Fig. 15

Friction factor measurement

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