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Journal of Engineering for Gas Turbines and Power | Volume 128 | Issue 1 | TECHNICAL PAPERS
TECHNICAL PAPERS: Internal Combustion Engines

Heat Transfer in Reciprocating Planar Curved Tube With Piston Cooling Application

[+] Author and Article Information
Shyy Woei Chang

Thermal Fluids Laboratory,  National Kaohsiung Marine University, No. 142; Hai-Chuan Road, Nan-Tzu District, Kaohsiung 811, Taiwan, ROC

Yao Zheng

Center for Engineering and Scientific Computation and College of Computer Science,  Zhejiang University, Hangzhou, Zhejiang 310027, P. R. China

J. Eng. Gas Turbines Power 128(1), 219-229 (Mar 01, 2005) (11 pages) doi:10.1115/1.1995768 History: Received October 20, 2003; Revised March 01, 2005
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This paper describes an experimental study of heat transfer in a reciprocating planar curved tube that simulates a cooling passage in piston. The coupled inertial, centrifugal, and reciprocating forces in the reciprocating curved tube interact with buoyancy to exhibit a synergistic effect on heat transfer. For the present experimental conditions, the local Nusselt numbers in the reciprocating curved tube are in the range of 0.6–1.15 times of static tube levels. Without buoyancy interaction, the coupled reciprocating and centrifugal force effect causes the heat transfer to be initially reduced from the static level but recovered when the reciprocating force is further increased. Heat transfer improvement and impediment could be superimposed by the location-dependent buoyancy effect. The empirical heat transfer correlation has been developed to permit the evaluation of the individual and interactive effects of inertial, centrifugal, and reciprocating forces with and without buoyancy interaction on local heat transfer in a reciprocating planar curved tube.
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Copyright © 2006 by American Society of Mechanical Engineers
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References

Figures

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+Piston-cooling networks of B&W L90G FCA and L90 GB diesel engines
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Piston-cooling networks of B&W L90G FCA and L90 GB diesel engines
Figure 1

Piston-cooling networks of B&W L90G FCA and L90 GB diesel engines

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+Experimental apparatus
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Experimental apparatus
Figure 2

Experimental apparatus

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+Typical circumferential heat transfer distributions in static coil
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Typical circumferential heat transfer distributions in static coil
Figure 3

Typical circumferential heat transfer distributions in static coil

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+Streamwise heat transfer variations along measured angular edges in static coil
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Streamwise heat transfer variations along measured angular edges in static coil
Figure 4

Streamwise heat transfer variations along measured angular edges in static coil

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+Typical circumferential heat transfer distributions in reciprocating coil
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Typical circumferential heat transfer distributions in reciprocating coil
Figure 5

Typical circumferential heat transfer distributions in reciprocating coil

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+Circumferential distributions of relative Nusselt number in reciprocating coil
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Circumferential distributions of relative Nusselt number in reciprocating coil
Figure 6

Circumferential distributions of relative Nusselt number in reciprocating coil

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+Extrapolating heat transfer results into asymptotic zero-buoyancy levels
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Extrapolating heat transfer results into asymptotic zero-buoyancy levels
Figure 7

Extrapolating heat transfer results into asymptotic zero-buoyancy levels

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+Typical isolated Pu effect on heat transfer with various Dean numbers
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Typical isolated Pu effect on heat transfer with various Dean numbers
Figure 8

Typical isolated Pu effect on heat transfer with various Dean numbers

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+Variations of fa and fb coefficients with Dean number at X=16.4 and θ=135deg
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Variations of fa and fb coefficients with Dean number at X=16.4 and θ=135deg
Figure 9

Variations of fa and fb coefficients with Dean number at X=16.4 and θ=135deg

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+Typical reciprocating-buoyancy effects on heat transfer
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Typical reciprocating-buoyancy effects on heat transfer
Figure 10

Typical reciprocating-buoyancy effects on heat transfer

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+Comparison of experimental measurements with correlation evaluations
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Comparison of experimental measurements with correlation evaluations
Figure 11

Comparison of experimental measurements with correlation evaluations

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