Internal Cooling Using Porous Turbulators: Heat Transfer and Pressure Drop Measurements

Mahadevan, Srikrishna; Ricklick, Mark; Kapat, Jayanta

doi:10.2514/1.t3919

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…They found that half-perforated baffles have a higher improvement in thermo-hydraulic performance than fully-perforated baffles. [14] studied experimentally the pressure drop and heat transfer in a channel with a low aspect ratio mounted in its staggered carbon foams working as porous baffles. As well as the effect of the channel blockage ratio on the heat transfer coefficient and pressure drop was included.…”

Section: Introductionmentioning

confidence: 99%

Effect of Copper Foam Baffles on Thermal Hydraulic Performance for Staggered Arrangement in a Duct

Fadhala¹,

Fayyadh²,

M³

2022

ETJ

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 Experimental study of the copper foam baffle on heat transfer and friction factor.  Study the grade influence of pore density for copper foam baffles at fixed porosity on the flow and thermal behavior.  The copper foam baffles were compared with solid copper baffles.M etal foam is a novel material recently utilized in baffles as an alternative to solid baffles for reducing flow resistance. However, copper foam baffles have been suggested in this research to overcome this issue. So, the experimental tests were carried out in a manufactured square channel (250 mm x 250 mm) and heated uniformly at the bottom wall of the test section. Its walls are mounted copper foam baffles at a fixed porosity of 95%. Baffles were fixed alternatively on the top and bottom of the walls in staggered mode between two successive baffles (center to center) and were kept constant at 250 mm. The experimental work was done for different grades of the pore density of copper foam (10, 15, and 20 pores per inch (PPI)) with a window cut ratio of 25% and a constant heat flux of 4.4 kW/m 2 . Reynolds number was varied from 3.8x10 4 to 5.4x10 4 . The data for conventional copper solid baffles were used to compare the effect of foam metal baffles. The obtained results manifested that relative to the solid-copper baffles, the copper foam baffles have a greatly lower friction factor, whereas the friction factor for the solid baffles and copper foam baffles (10, 15, and 20) PPI is about (460), and (20, 29, and 38) times, respectively above the smooth surface. M oreover, the results of previous work predicted the present experimental work very well.

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Section: Introductionmentioning

confidence: 99%

Effect of Copper Foam Baffles on Thermal Hydraulic Performance for Staggered Arrangement in a Duct

Fadhala¹,

Fayyadh²,

M³

2022

ETJ

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Effects of Rib Shapes on the Entropy Generation in a Ribbed Duct

Javadi

Rashidi

Esfahani

2018

Journal of Thermophysics and Heat Transfer

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Experimental investigation on the thermal-hydraulic performance of channel with gradient metal foam baffles

Fadhala¹,

Fayyadh²,

M³

2023

FME Transactions

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Metal foam is a novel material recently utilized in baffles as an alternative to solid baffles for reducing flow resistance. However, the metal foam baffles are accompanied by low heat transfer efficiency. To overcome this issue, a new design of copper foam baffles has been suggested in this research, called baffles having a gradient pore density of the copper foam. The pore density either increases or decreases towards the wall. So, the experimental tests were carried out in a square channel and heated uniformly at the bottom wall of the test section. Its walls are mounted copper foam baffles at a fixed porosity of 95%. Baffles were alternately fixed upon the walls' bottom and top in staggered mode. The results were determined for various kinds of copper foam (10 and 20) pores per inch (PPI), and the gradient pore density was either with the order decreasing (DPPI) 10/20 PPI or increasing (IPPI) 20/10 PPI with a window cut ratio of 25% and a constant heat flux of 4.4 kW/m2 . The Reynolds number was changed from 3.8x104 to 5.4x104 . The data for conventional copper solid baffles were used to compare the influence of foam metal type. The obtained results revealed an enhancement in thermohydraulic performance for baffles with a gradient pore density of the order decreasing DPPI (10/20 PPI) higher than all the models of copper foam baffles.

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Internal Cooling Using Porous Turbulators: Heat Transfer and Pressure Drop Measurements

Cited by 3 publications

References 12 publications

Effect of Copper Foam Baffles on Thermal Hydraulic Performance for Staggered Arrangement in a Duct

Effect of Copper Foam Baffles on Thermal Hydraulic Performance for Staggered Arrangement in a Duct

Effects of Rib Shapes on the Entropy Generation in a Ribbed Duct

Experimental investigation on the thermal-hydraulic performance of channel with gradient metal foam baffles

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