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Research Papers: Forced Convection

Conjugate Heat Transfer in Air-to-Refrigerant Airfoil Heat Exchangers

[+] Author and Article Information
Yutaka Ito

Tokyo Institute of Technology,
4259-G3-33-402, Nagatsuta-cho,
Midori-ku, Yokohama,
Kanagawa 226-8502, Japan
e-mail: itoyu110@00.alumni.u-tokyo.ac.jp

Naoya Inokura

Tokyo Institute of Technology,
4259-G3-33-402, Nagatsuta-cho,
Midori-ku, Yokohama,
Kanagawa 226-8502, Japan

Takao Nagasaki

Tokyo Institute of Technology,
4259-G3-33-402, Nagatsuta-cho,
Midori-ku, Yokohama,
Kanagawa 226-8502, Japan
e-mail: tnagasak@es.titech.ac.jp

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received October 28, 2013; final manuscript received April 7, 2014; published online May 21, 2014. Assoc. Editor: Giulio Lorenzini.

J. Heat Transfer 136(8), 081703 (May 21, 2014) (12 pages) Paper No: HT-13-1554; doi: 10.1115/1.4027554 History: Received October 28, 2013; Revised April 07, 2014

A light and compact heat exchange system was realized using two air-to-refrigerant airfoil heat exchangers and a recirculated heat transport refrigerant. Its heat transfer performance was experimentally investigated. Carbon dioxide or water was used as a refrigerant up to a pressure of 30 MPa. Heat transfer coefficients on the outer air-contact and inner refrigerant-contact surfaces were calculated using an inverse heat transfer method. Correlations were developed for the Nusselt numbers of carbon dioxide and water on the inner refrigerant-contact surface. Furthermore, we proposed a method to evaluate a correction factor corresponding to the thermal resistance of the airfoil heat exchanger.

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References

Wilfert, G., Kriegl, B., Wald, L., and Johanssen, O., 2005, “CLEAN—Validation of a GTF High Speed Turbine and Integration of Heat Exchanger Technology in an Environmental Friendly Engine Concept,” Proceedings of 17th International Symposium on Air Breathing Engines ISABE 2005, Munich, ISABE-2005-1156.
McDonald, C. F., Massardo, A. F., Rodgers, C., and Stone, A., 2008, “Recuperated Gas Turbine Aeroengines. Part III: Engine Concepts for Reduced Emissions, Lower Fuel Consumption, and Noise Abatement,” Aircr. Eng. Aerosp. Technol., 80(4), pp. 408–426. [CrossRef]
Rolt, A. M., and Baker, N. J., 2009, “Intercooled Turbofan Engine Design and Technology Research in the EU Framework 6 NEWAC Programme,” Proceedings of 18th International Symposium on Air Breathing Engines ISABE 2009, Montreal, ISABE-2009-1278.
Ito, Y., and Nagasaki, T., 2011, “Suggestion of Intercooled and Recuperated Jet Engine Using Already Equipped Components as Heat Exchangers,” Proceedings of 47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, San Diego, Paper No. AIAA-2011-6102.
Nealy, D. A., Gladden, H. J., Mihelc, M. S., and Hylton, L. D., 1984, “Measurements of Heat Transfer Distribution Over the Surfaces of Highly Loaded Turbine Nozzle Guide Vanes,” ASME J. Eng. Gas Turbine Power, 106(1), pp. 149–158. [CrossRef]
Bejan, A., 1997, “Constructal-Theory Network of Conducting Paths for Cooling a Heat Generating Volume,” Int. J. Heat Mass Transfer, 40(4), pp. 799–816. [CrossRef]
Lorenzini, G., and Moretti, S., 2009, “A Bejan's Constructal Theory Approach to the Overall Optimization of Heat Exchanging Finned Modules With Air in Forced Convection and Laminar Flow Condition,” ASME J. Heat Transfer, 131(8), p. 081801. [CrossRef]
Lorenzini, G., and Moretti, S., 2008, “Numerical Heat Transfer Optimisation in Modular Systems of Y-Shaped Fins,” ASME J. Heat Transfer, 130(8), p. 081801. [CrossRef]
Lorenzini, G., and Moretti, S., 2007, “A CFD Application to Optimize T-Shaped Fins: Comparisons to the Constructal Theory's Results,” ASME J. Electron. Packag., 129(3), pp. 324–327. [CrossRef]
Lorenzini, G., and Moretti, S., 2009, “Numerical Performance Analysis of Constructal I and Y Finned Heat Exchanging Modules,” ASME J. Electron. Packag., 131(3), p. 031012. [CrossRef]
Nishiyama, T., 1998, Yokugata Nagare Gaku, Nikkan Kogyo Shimbun Ltd. (Business & Technology Daily News), Tokyo, p. 23 (translated as Aerodynamics of Airfoil), (in Japanese).
Turner, A. B., 1971, “Local Heat Transfer Measurements on a Gas Turbine Blade,” J. Mech. Eng. Sci., 13, pp. 1–12. [CrossRef]
Dunavant, J. C., Emery, J. C., Walch, H. C., and Westphal, W. R., 1955, “High-Speed Cascade Tests of the NACA 65-(12A10)10 and NACA 65-(12A2I8b)10 Compressor Blade Sections,” National Advisory Committee for Aeronautics, Washington, DC, Report No. NACA RM L55I08.
Lorenzini, G., and Moretti, S., 2011, “Bejan's Constructal Theory Analysis of Gas-Liquid Cooled Finned Modules,” ASME J. Heat Transfer, 133(7), p. 071801. [CrossRef]
Liao, S. M., and Zhao, T. S., 2012, “Measurements of Heat Transfer Coefficients From Supercritical Carbon Dioxide Flowing in Horizontal Mini/Micro Channels,” ASME J. Heat Transfer, 124(3), pp. 413–420. [CrossRef]
Erwin, J. R., Savage, M., and Emery, J. C., 1956, “Two-Dimensional Low-Speed Cascade Investigation of NACA Compressor Blade Sections Having a Systematic Variation in Mean-Line Loading,” National Advisory Committee for Aeronautics, Washington, DC, Report No. NACA TN 3817.
Ju, D. Y., 2002, “Residual Stress Formation during Casting: Continuous and Centrifugal Casting Processes,” Handbook of Residual Stress and Deformation of Steel, G. Totten, M. Howes, and T. Inoue, eds., ASM International, Materials Park, OH, pp. 372–390.
Span, R., and Wagner, W., 1996, “A New Equation of State for Carbon Dioxide Covering the Fluid Region from the Triple-Point Temperature to 1100 K at Pressures up to 800 MPa,” J. Phys. Chem. Ref. Data, 25(6), pp. 1509–1596. [CrossRef]
Vesovic, V., Wakeham, W. A., Oichowy, G. A., Sengers, J. V., Watson, J. T. R., and Millat, J., 1990, “The Transport Properties of Carbon Dioxide,” J. Phys. Chem. Ref. Data, 19(3), pp. 763–808. [CrossRef]
JSME Data Book, 1983, ThermoPhysical Properties of Fluids, Japan Society of Mechanical Engineers, Tokyo.
Pinilla, V., Solano, J. P., Paniagua, G., and Anthony, R. J., 2012, “Adiabatic Wall Temperature Evaluation in a High Speed Turbine,” ASME J. Heat Transfer, 134(9), p. 091601. [CrossRef]
Holman, J. P., 2009, Heat Transfer of International Edition, McGraw-Hill, New York, pp. 26–37.
Marquardt, D. W., 1963, “An Algorithm for Least-Squares Estimation of Nonlinear Parameters,” J. Soc. Ind. Appl. Math., 11(2), pp. 431–441. [CrossRef]
ALGLIB, 2013, ( www.alglib.net), Sergey Bochkanov.
Ainley, D. G., 1953, “An Experimental Single-Stage Air-Cooled Turbine, Part II. Research on the Performance of a Type of Internally Air-Cooled Turbine Blade,” Proc. Inst. Mech. Eng., 167, pp. 351–370. [CrossRef]
Fray, D. E., and Barnes, J. F., 1965, An Experimental High-Temperature Turbine (No. 126), Part I—The Cooling Performance of a Set of Extruded Air-Cooled Turbine Blades, Vol. 3405, Aeronautical Research Council, London.
Hodge, R. I., 1960, A Turbine Cascade Studies, Part I and II, Vols. 492, 493, Aeronautical Research Council, London.
Wilson, D. G., and Pope, J. A., 1954, “Convective Heat Transfer to Gas Turbine Blade Surfaces,” Proc. Inst. Mech. Eng., 168, pp. 861–876. [CrossRef]
Andrews, S. J., and Bradley, P. C., 1957, Heat Transfer to Turbine Blade, Vol. 294, Aeronautical Research Council, London.
Freche, J. C., and Diaguila, A. J., 1950, “Heat-Transfer and Operating Characteristics of Aluminum Forced-Convection Water-Cooled Single-Stage Turbines,” National Advisory Committee for Aeronautics, Washington, DC, Report No. NACA RM E50D03a.

Figures

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Fig. 1

Heat exchange system in which refrigerant transports heat from hot section to cold section

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Fig. 2

NACA65-(12A2I8b)10 airfoil heat exchanger as test model

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Fig. 3

Configurations of tested cascade of NACA65-(12A2I8b)10 airfoils

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Fig. 4

Refrigerant recirculation loop (in case of carbon dioxide as refrigerant) and piping around airfoils

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Fig. 5

Control volumes for inverse heat transfer method based on numerical analysis of heat conduction in airfoil heat exchanger and applied boundary conditions

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Fig. 6

Schematic view of air boundary layers around airfoil heat exchangers

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Fig. 7

Experimental air Mach, Prandtl, and Reynolds numbers versus airflow direction angle from airfoil chord

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Fig. 8

Comparison of temperature distributions of airfoil heat exchangers for large and small air modified Stanton numbers

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Fig. 9

Distributions of air pressure coefficient, air local Mach number, and adiabatic air temperature corresponding to experimental results shown in Fig. 8 (air pressure coefficient data were taken from Ref. [13])

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Fig. 10

Experimental air Nusselt number for each part versus air modified Stanton number

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Fig. 11

Average air Nusselt number versus air Reynolds number at outlet at various angles-of-attack α

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Fig. 12

Comparison of experimental refrigerant Nusselt number with Dittus–Boelter, Liao–Zhao, and our proposed correlations for carbon dioxide turbulent flows

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Fig. 13

Example of correction factor for heat transfer with refrigerant temperature effectiveness ϕref and the ratio of refrigerant heat capacity rate to that of air εRA at α = 10.5 deg, i.e., ξ = 1.03 deg

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Fig. 14

Comparison of experimental air Nusselt number with estimated values calculated by our proposed method

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