Heat transfer characteristics and entropy generation for wing-shaped-tubes with longitudinal external fins in cross-flow

Three-dimensional numerical study is conducted to investigate the heat transfer characteristics for the flow impingement cooling in the narrow passage based on cooling technology of turbine blade.The effects of the jet Reynolds number, impingement distance and initial cross-flow on heat transfer characteristic are investigated.Results show that when other parameters remain unchanged local heat transfer coefficient increases with increase of jet Reynolds number；overall heat transfer effect is reduced by initial cross-flow；there is an optimal distance to the best effect of heat transfer.

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Experimental investigation of the discharge coefficient and impingement heat transfer characteristics of a single jet in cross flow

10.17760/d20002912 ◽

2012 ◽

Author(s):

Brian Roberts

Keyword(s):

Heat Transfer ◽

Experimental Investigation ◽

Discharge Coefficient ◽

Cross Flow ◽

Heat Transfer Characteristics ◽

Transfer Characteristics ◽

Impingement Heat Transfer ◽

Jet In Cross Flow ◽

Single Jet

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Experimental Studies of Heat Transfer Characteristics and Properties of the Cross-Flow Pipe Flow Melt Lead

Open Journal of Microphysics ◽

10.4236/ojm.2014.44008 ◽

2014 ◽

Vol 04 (04) ◽

pp. 54-65 ◽

Cited By ~ 2

Author(s):

Alexandr Viktorovich Beznosov ◽

Mikhail Vladimirovich Yarmonov ◽

Artyom Dmitrievich Zudin ◽

Alexey Sergeevich Chernysh ◽

Olga Olegovna Novogilova ◽

...

Keyword(s):

Heat Transfer ◽

Pipe Flow ◽

Experimental Studies ◽

Cross Flow ◽

Heat Transfer Characteristics ◽

Transfer Characteristics ◽

The Cross

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The Effect of Geometrical Parameters on Heat Transfer Characteristics of Compact Heat Exchanger with Louvered Fins

ISRN Thermodynamics ◽

10.5402/2012/832708 ◽

2012 ◽

Vol 2012 ◽

pp. 1-10 ◽

Cited By ~ 7

Author(s):

P. Gunnasegaran ◽

N. H. Shuaib ◽

M. F. Abdul Jalal

Keyword(s):

Heat Transfer ◽

Heat Exchangers ◽

Three Dimensional ◽

Cross Flow ◽

Geometrical Parameters ◽

Heat Transfer Characteristics ◽

Transfer Characteristics ◽

Flow And Heat Transfer ◽

Drop Flow ◽

Louvered Fins

Compact heat exchangers (CHEs) have been widely used in various applications in thermal fluid systems including automotive thermal management systems. Among the different types of heat exchangers for engine cooling applications, cross-flow CHEs with louvered fins are of special interest because of their higher heat rejection capability with the lower flow resistance. In this study, the effects of geometrical parameters such as louver angle and fin pitch on air flow and heat transfer characteristics on CHEs are numerically investigated. Numerical investigations using five different cases with increased and decreased louver angles (+2°, +4°, −2°, −4°, and uniform angle 20°), with a fixed fin pitch and using three different fin pitches (1.0 mm, 2.0 mm, and 4.0 mm), and with the fixed louver angle are examined. The three-dimensional (3D) governing equations for the fluid flow and heat transfer are solved using a standard finite-volume method (FVM) for the range of Reynolds number between 100 and 1000. The computational model is used to study the variations of pressure drop, flow temperature, and Nusselt number.

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