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TECHNICAL PAPERS: Heat Transfer in Manufacturing

Fluid-Dynamic Analysis and Optimization of the Quenching Process for Hardening of Change-Speed Gears Using DOE–ANOVA Method

[+] Author and Article Information
Paolo M. Congedo, Antonio Ficarella, Domenico Laforgia

Dipartimento di Ingegneria Dell’Innovazione-Crea, Università Degli Studi di Lecce, via per Arnesano, Lecce, Italy, I-73100

J. Heat Transfer 126(3), 365-375 (Jun 16, 2004) (11 pages) doi:10.1115/1.1731355 History: Received November 01, 2002; Revised February 04, 2004; Online June 16, 2004
Copyright © 2004 by ASME
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References

Mgbokwere,  C., and Callabresi,  M., 2000, “Numerical Simulation of a Heat-Treated Ring Gear Blank,” ASME J. Eng. Mater. Technol., 122, pp. 305–314.
Congedo, P. M., Ficarella, A., and Laforgia, D., 2001, “Analisi Termo-Fluidodinamica di un Processo di Normalizzazione di Ruote Dentate all’interno di un Forno di Tempra,” Proc. 56° Congresso Nazionale ATI, Napoli, Italy, 3 , pp. 13–24.
Sima,  M. A., and Harris,  J. A., 1999, “Numerical Modeling of Flow in a Vertical Cooling Crystallizer,” ASME J. Fluids Eng., 121, pp. 148–155.
Jahnke,  C. C., and Valentine,  D. T., 1998, “Recirculation Zones in a Cylindrical Container,” ASME J. Fluids Eng., 120, pp. 680–684.
Roache,  P. J., 1994, “Perspective: A Method for Uniform Reporting of Grid Refinement Studies,” ASME J. Fluids Eng., 116, pp. 405–413.
Roache, P. J., 1998, Verification and Validation in Computational Science and Engineering, Hermosa Publishers, Albuquerque, New Mexico.
Roy, R. K., 2001, Design of Experiments Using the Taguchi Approach, Wiley-Interscience, NY.
DeGroot, M. H., and Schervish, M. J., 2002, Probability and Statistics, Addison Wesley, Chap. 10.
Montgomery, D. C., and Runger, G. C., 1999, Applied Statistics and Probability for Engineers, John Wiley & Songs.
Launder, B. E., and Spalding, D. B., 1972, Lectures in Mathematical Models of Turbulence, Academic Press, London, England.
Nicodemi, W., 1991, Metallurgia, Masson Editore, Italy.

Figures

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Geometrical configuration
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A detail of drilled metallic discs around a central tubular mount where the gears are placed
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Experimental data for the actual configuration: gears planarity errors versus the position varying the operating pressure
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Experimental data for the actual configuration: gear planarity errors versus the operating pressure
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Contours of velocity magnitude for the original configuration 2
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Volume average temperature of the gear no. 1 versus time varying the grid spacing
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Grid convergence indexes, auditing ratio and order of convergence versus time (grid spacing analysis)
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Volume average temperature of the gear no. 1 versus time varying the time step
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Grid convergence indexes, auditing ratio and order of convergence versus time (time step analysis)
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Main effects on performance index 1 (heat transfer rate) versus the design parameters
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Main effects on performance index 2 (cooling homogeneity between gears) versus the design parameters
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Main effects on performance index 3 (cooling homogeneity inside each gears) versus the design parameters
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Design parameters interaction effects on index 1 (heat transfer rate)
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Design parameters interaction effects on index 2 (cooling homogeneity between gears)
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Design parameters interaction effects on index 3 (cooling homogeneity inside each gears)
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Nitrogen path lines with configuration 4
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Nitrogen path lines with configuration 15

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