Case Studies in Thermal Engineering · 2017 · 61 citations · 34 references
EngineeringMechanical EngineeringAerodynamicsFluid DynamicsHeat TransferExperimental AerodynamicsHeat ExchangersHeat FlowHeat Transfer AnalysisHeat Transfer In FluidsHeat Transfer ModelingFlow Through Heat ExchangersFrictionFriction FactorHeat Transfer EnhancementHeat Transfer MechanismsNusselt NumberReynolds NumberReynolds Number Effects
This work presents, an experimental study on Nusselt number (Nurs) and friction factor (frs) of heat exchanger circular tube fitted with multiple square perforated with square wing twisted tape inserts. The experimental determination encompassed the geometrical parameters namely, wing depth ratio (Wd/WT) of 0.042–0.167, perforation width ratio (a/WT) of 0.250, twist ratio (TL/WT) of 2.5, and number of twisted tapes (NT) of 4.0. The effect of multiple square perforated twisted tape with square wing has been investigated for the range of Reynolds number (Ren) varied from 5000 to 27,000. The maximum enhancement in Nurs and frs is observed to be 6.96 and 8.34 times of that of the plain circular tube, respectively. Correlations of Nurs, frs and ηp are established in term of Ren and geometrical parameters of wings twisted tape which can be used to predict the values of Nurs, frs and ηp with considerably good accuracy.
34
Describing Uncertainty in Single Sample Experiments
S. J. Kline · Mechanical Engineering · 1953 · 6.6K citations
Computing, Mathematics, Statistics +11
Jian Guo, Aiwu Fan, Xiaoyu Zhang et al. · International Journal of Thermal Sciences · 2011 · 297 citations
Engineering, Mechanical Engineering, Computational Heat Transfer +16