Thermal performance of a circular tube embedded with TBVG inserts: an experimental study

Bahuguna, Rahul; Mer, K. K. S.; Kumar, Manoj; Chamoli, Sunil

doi:10.1007/s10973-022-11352-1

Cited by 12 publications

(1 citation statement)

References 44 publications

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“…It was observed that a peak TEF of 1.66 was achieved for an angle of inclination of 30°, two twisted tapes and a twist ratio of 3. Bahuguna et al 36 made use of triple blade vortex generator (TBVG) which was in both solid and perforated configurations. The parameters that were varied were the pitch ratio (1,2,3 & 4), perforation index (0% and 25%) for a constant blade angle of 45°.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer augmentation of solar air heater using discrete transverse sinewave corrugations

Sankalp Shekar,

Nagaraj,

Mallashetty Shivamallaiah

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The influence of discretely placed sinewave corrugations on the effective thermal performance of the solar air heater system is presented using numerical methodology. The effect of forward and backward arrangement, normalised wavelength and amplitude on heat transfer enhancement is evaluated for different Reynolds number ranging between 6000 and 24,000. The non-dimensional wavelength and amplitude is varied as 0.0125–0.05 and 0.05–0.2 respectively while the non-dimensional pitch is taken as 1.875. The results show that the forward arrangement pattern of sinewave corrugation provides better thermo-hydraulic performance than the backward arrangement. For any given non-dimensional wavelength, lower non-dimensional amplitude exhibits greater thermal enhancement factor while for a fixed non-dimensional amplitude, the wavelength ratio of 0.025 provides greater thermal enhancement factor. The corrugation having amplitude ratio of 0.1 and wavelength ratio of 0.025 exhibits the highest thermal enhancement factor of 1.69 at Reynolds Number of 6000. It is also observed that, for Reynolds Number lesser than 9000, the configuration of amplitude ratio of 0.1 is found to exhibit higher thermal enhancement factor for any given non-dimensional wavelength. However, for Reynolds Number greater than 9000, the configuration of amplitude ratio of 0.05 is found to exhibit higher thermal enhancement factor for any given non-dimensional wavelength.

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Section: Introductionmentioning

confidence: 99%