Development of Techniques for Improving Piston Cooling Performance (Second Report)~Oil Movement and Heat Transfer Simulation in Piston Cooling Channel With CFD

A coupled heat transfer (CHT) solver was established. The solver couples the N-S equations with the heat conduction equation using the finite volume method. The developed CHT solver was verified by Mark II 5411 case. The numerical results agree well with experimental data, proving the accuracy of the developed CHT code. The solver was applied to the coupled heat transfer simulations of an air-cooled turbine with a single cooling channel. Adiabatic results and CHT results were compared. Different turbulence and transition models were employed. The result shows that the developed code is of great use in engineering simulations, and in order to predict thermal loads on turbine vane accurately, transition needs to be considered.

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Numerical Evaluation of Pin Fin Inclination by Conjugate Heat Transfer Simulation With URANS

Volume 5A: Heat Transfer ◽

10.1115/gt2015-42869 ◽

2015 ◽

Author(s):

Takashi Yamane

Keyword(s):

Heat Transfer ◽

Thermal Conduction ◽

Conjugate Heat Transfer ◽

Turbine Blades ◽

Flow Region ◽

Cooling Performance ◽

Pin Fin ◽

Blade Cooling ◽

Pin Fins ◽

Heat Transfer Simulation

Short pin fins are often used as one of the blade cooling technologies inside the trailing edge of turbine blades. In our previous study we focused on the effects of pin inclination for overall cooling performance especially including heat conduction between the pins and endwall by both experiments and the conjugate heat transfer simulations, then the forwardly inclined pin-fins are found to effectively enhance the cooling, but we also found that the steady conjugate heat transfer simulation underestimates the cooling performance of the straight pin-fins due to highly unsteady flow structure. In this study the URANS is coupled with the steady thermal conduction by using the time smoothing method in the flow region, thus the underestimate of the heat transfer for the straight pin-fins was significantly improved.

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Enhanced Heat Transfer of Shaker-Bored Piston Cooling Channel with Twisted Tape Insert

Heat Transfer Engineering ◽

10.1080/01457630601122740 ◽

2007 ◽

Vol 28 (4) ◽

pp. 321-334 ◽

Cited By ~ 27

Author(s):

S. W. Chang ◽

L. M. Su ◽

T. L. Yang ◽

S. F. Chiou

Keyword(s):

Heat Transfer ◽

Twisted Tape ◽

Cooling Channel ◽

Enhanced Heat Transfer ◽

Piston Cooling

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Film Cooling Performance Analysis of a Full-scale Liquid Rocket Engine Combustion Chamber based on a Coupled Combustion and Heat Transfer Simulation

53rd AIAA/SAE/ASEE Joint Propulsion Conference ◽

10.2514/6.2017-4919 ◽

2017 ◽

Cited By ~ 3

Author(s):

Yu Daimon ◽

Hideyo Negishi ◽

Hideto Kawashima

Keyword(s):

Heat Transfer ◽

Performance Analysis ◽

Combustion Chamber ◽

Film Cooling ◽

Rocket Engine ◽

Liquid Rocket Engine ◽

Cooling Performance ◽

Engine Combustion ◽

Heat Transfer Simulation ◽

Liquid Rocket

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Influence of Reciprocating Motion on Heat Transfer Inside a Ribbed Duct with Application to Piston Cooling in Marine Diesel Engines

Journal of Ship Research ◽

10.5957/jsr.1997.41.4.332 ◽

1997 ◽

Vol 41 (04) ◽

pp. 332-339

Author(s):

S. W. Chang ◽

L. M. Su

Keyword(s):

Heat Transfer ◽

Cooling System ◽

Duct Flow ◽

Reciprocating Motion ◽

Heat Transfer Characteristics ◽

Enhanced Heat Transfer ◽

Cooling Performance ◽

Marine Diesel ◽

Heat Transfer Improvement ◽

Piston Cooling

This paper presents the results of an experimental study aimed at investigating the effect of reciprocating motion on the heat transfer for the flow inside a square ribbed enclosure. This flow configuration was a modification of the modern cooling system within a reciprocating piston of a marine heavy diesel engine. Initially, the heat transfer characteristics for the ribbed duct flow were examined and validated by comparing the present data with the relevant publications. Significant heat transfer enhancements detected from the nonreciprocating forced convection tests suggested the potential for heat transfer improvement using ribbed coolant channel. For the shaking effect on the cooling performance of the ribbed enclosure, a heat transfer impediment near which the thermal boundary layers were initiated was found when the reciprocating force was relatively low. Further increase of the reciprocating force or the level of heating power enhanced heat transfer. At the highest reciprocating speed tested, the heat transfer could be increased to a level about 145% of the equivalent stationary case. This study clarified that the circular ribs could be added inside the cooling passages in order to improve the cooling performance of the piston.

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