Effect of the base angle of an isosceles obtuse-angled trapezoidal duct of a solar air heater on fluid flow and thermal characteristics – an experimental and computational investigation

Dara, Rambabu; Muvvala, Pullarao

doi:10.1007/s12206-024-0649-0

J Mech Sci Technol

2024

DOI: 10.1007/s12206-024-0649-0

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Effect of the base angle of an isosceles obtuse-angled trapezoidal duct of a solar air heater on fluid flow and thermal characteristics – an experimental and computational investigation

Rambabu Dara,

Pullarao Muvvala

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2024

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Fluid Flow and Thermal Characteristics of an Obtuse-Angled Trapezoidal Solar Air Heater Channel With Corner Modifications and Ribs on Absorber Plates

Dara,

Muvvala

2024

Journal of Thermal Science and Engineering Applications

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In the ongoing research, an endeavour is made to discover the thermal and flow behaviour of air flowing through isosceles obtuse-angled trapezoidal solar air heater (SAH) channel by integrating couple of geometrical amendments in the flow passage. By amending one or two bottom corners of the simple channel (model1) from regular sharp to curvatures, two channels, i.e. model2 and model3 are generated. Out of the models1 to 3, the better model is discovered to be model3, according to rise in air bulk temperature value. The effect of corner radius of curvature (5-20 mm) is also investigated on these three models. On the better model3, rectangular ribs are deployed on few or all absorber plates, consequently, five channels, i.e. model4 to 8 are generated. In these models, the rib parameters are adjusted, and advance inquiries are accomplished. 3-D computational studies are operated by employing the ANSYS Fluent. Furthermore, experiments are steered to justify the computational findings. The investigations are conceded over Reynolds numbers: 5000-28000. The impact of operational factors on Nusselt number, friction factor, and channel exit air temperature is examined. The foremost goal of SAH is to heat the air to larger extent while passing through the channel. It is identified that the SAH channel model4 (bottom two corners are with curvature 20 mm and rectangular ribs on top absorber plate with relative rib height 0.04) is the supreme possibility, displaying temperature augmentation of 32.32% in contrast to the simple trapezoidal channel.

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Fluid Flow and Thermal Characteristics of an Obtuse-Angled Trapezoidal Solar Air Heater Channel With Corner Modifications and Ribs on Absorber Plates

Dara,

Muvvala

2024

Journal of Thermal Science and Engineering Applications

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Effect of the base angle of an isosceles obtuse-angled trapezoidal duct of a solar air heater on fluid flow and thermal characteristics – an experimental and computational investigation

Cited by 1 publication

References 35 publications

Fluid Flow and Thermal Characteristics of an Obtuse-Angled Trapezoidal Solar Air Heater Channel With Corner Modifications and Ribs on Absorber Plates

Fluid Flow and Thermal Characteristics of an Obtuse-Angled Trapezoidal Solar Air Heater Channel With Corner Modifications and Ribs on Absorber Plates

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