Effect of interwall spacing on heat transfer and pressure drop in a corrugated-wall duct

Experiments were conducted to determine the axial distribution of per-facet and per-cycle heat transfer coefficients for turbulent flow in an isothermal, corrugated-wall duct with variable interwall spacing. The investigation was conducted via a mass transfer technique. The focus of the study was on two regions of the duct: the combined thermal-hydraulic entrance region and the periodic, fully developed region. A visualization technique was employed to examine the effect of interwall spacing on the pattern of fluid flow. Pressure drop and heat transfer results were employed to evaluate the thermal performance of the duct.