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TECHNICAL PAPERS: Internal Combustion Engines

Studies of a Heat-Pipe Cooled Piston Crown

[+] Author and Article Information
Q. Wang, G. Chen

Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208

Y. Cao, R. Wang, F. Mignano

Department of Mechanical Engineering, Florida International University, Miami, FL 33174

J. Eng. Gas Turbines Power 122(1), 99-105 (Jan 19, 1999) (7 pages) doi:10.1115/1.483181 History: Received February 26, 1998; Revised January 19, 1999
Copyright © 2000 by ASME
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References

Law, D. A., and Day, R. A., 1969, “Oil Cooled Aluminum Alloy Diesel Engine Pistons—A New Approach,” SAE Paper 690749.
Mihara, K., and Kidoguchi, I., 1992, “Development of Nodular Cast Iron Pistons With Permanent Molding Process for High Speed Diesel Engines,” SAE Paper 921700.
Monro, R., and Griffiths, W. J., 1979, “Development and Operating Experience of Pistons for Medium Speed Diesel Engines,” presented at the general meeting of the Diesel Engineers and Users Association in London.
Cao,  Y., and Wang,  Q., 1995, “Reciprocating Heat Pipes and Their Applications,” ASME J. Heat Transfer, 117, No. 2, pp. 1094–1096.
Cao,  Y., and Wang,  Q., 1995, “Thermal Analysis of the Piston Cooling System With Reciprocating Heat Pipes,” Heat Transfer Eng., 16, pp. 50–57.
Wang, Q., Cao, Y., and Souto, A., 1995, “Development of a New Engine Piston Incorporating Heat Pipe Cooling Technology,” Analysis of New Diesel Engine and Component Design, pp. 19–25.
Cotter, T. P., 1965, Heat Pipe Theory and Practice, Hemisphere Publishing, Washington D.C.
Cao,  Y., and Faghri,  A., 1992, “Transient Multidimensional Analysis of Nonconvetional Heat Pipes With Uniform and Nonuniform Heat Distributions,” ASME J. Heat Transfer, 113, pp. 995–1002.
Ling,  J., Cao,  Y., and Wang,  Q., 1996, “Experimental Investigations and Correlations for the Performance of Reciprocating Heat Pipes,” Heat Transfer Eng., 17, pp. 34–45.
Mignano, F., Wang, R., Chen, G., Wang, Q., Cao, Y., and Vargas, A., 1998, “Development of a Diesel-Engine Piston by Incorporating Heat Pipe Technology—Experimental Simulation of Piston Crown,” to be presented at the 1998 SAE International Congress, Detroit, MI.
Chen, G., Wang, Q., Cao, Y., and Tso, C., 1998, “Development of an Isothermal Journal Bearing by Utilizing the Heat-Pipe Cooling Technology,” Tribol. Trans., accepted for publication.
Wang, Q., Cao, Y., and Velasquez, A., 1996, “A Study of the Impingement Frequency of Fluid in Curved Pipes for Piston Applications,” Applications of New Diesel Engine and Component Design, pp. 13–18.
Wong, T. Y., Scott, C. G., and Ripple, E. D., 1993, “Diesel Engine Piston Scuffing: A Preliminary Investigation,” SAE Paper 930687.
Wang,  Q., Cao,  Y., and Chen,  G., 1996, “Piston Assembly Design for Improved Thermal-Tribological Performance,” Tribol. Trans., 39, pp. 483–489.

Figures

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Structure of the simplified piston crown with an annular heat pipe
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Heat input and temperature measurement. (A total of 24 thermocouples were used. They were in five circles, three of them were on the outer surface and the other two were on the inner surface. The thermocouples on each circle were 90 apart forming eight lines in the longitudinal direction.)
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Photograph of the reciprocating engine-simulation tester
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Comparisons of the maximum temperature differences in the ring-bank area of the simplified piston with and without the heat pipe
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Simplified piston crowns with and without the heat-pipe channel, (a) with the annular heat-pipe channel; and (b) without the annular heat-pipe channel.
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FEM meshes for the simplified crown and the isolator on the top land: (a) the isolator; (b) the simplified crown.
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Comparison between the calculated and measured ring-bank temperatures for the simplified crown represented by the solid model structure in Fig. 5(a): (a) on the inner surface of the ring area, without the annular heat pipe (model (2)); (b) on the outer surface of the ring area, without the annular heat pipe (model (2)); (c) on the inner surface of the ring area, AHPCC (model (1)); and (d) on the outer surface of the ring area, AHPCC (model (1)).
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Calculated ring-bank temperatures for the crowns with a heat input of 255 W: (a) without the annular heat pipe (model (2)), solid structure shown in Fig. 5(a); (b) without the annular heat pipe (model (2)), solid structure shown in Fig. 5(b); and (c) with the annular heat pipe (AHPCC, model (1)).
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Isotherms for the crowns when the heat input is 255 W: (a) without the annular heat pipe, solid model shown in Fig. 5(a); (b) without the annular heat pipe, solid model shown in Fig. 5(b); and (c) with the annular heat pipe.
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Calculated ring-bank temperatures for the crowns when the heat input is 510 W: (a) without the annular heat pipe, solid model shown in Fig. 5(a); (b) without the annular heat pipe, solid model shown in Fig. 5(b); and (c) with the annular heat pipe.
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Isotherms for the simulated crown when the heat input is 510 W: (a) without the annular heat pipe, solid model shown in Fig. 5(a); (b) without the annular heat pipe, solid model shown in Fig. 5(b); and (c) with the annular heat pipe.

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