Thermos-aerodynamic performance and heat transfer analysis in a rectangular channel using various angle groove geometry

The effects of heat transfer and friction factors are critical portions of an endwall passive technique to achieve an optimum level of thermal index. In this study, three groove endwalls arranged at 45° to the axial flow direction with only one side of endwalls is wholly covered with angled grooves roughened surface while the other sides are kept smooth. The three grooved endwalls use in this study have relative pitch roughness, P/δ, print diameter, D p , and inclined at an angle to flow direction, (i.e., P/δ = 13, D p =2; P/δ = 9, D p = 2; P/δ = 6.5, D p =4; and α = 45 °). The groove endwalls are then used to measure the channel pressure drop and enhanced heat transfer from the surface of the plate. IR Camera is also used to study the flow full field behavioural effect at various groove arrangements and Reynolds numbers (600 ≥ Re ≤ 11000). The outcomes reveal the effect of friction factors, Nusselt number, and performance index at the Reynolds number Re and 5 mm channel. The experiments presented figures for f G , f G /f 0 , Nu, Nu/Nu 0 , and thermal performance, [ Nu G /Nu 0 /(f G /f 0 ) 1/3 ]. From the results of the investigation, the groove roughened surfaces enhance the heat transfer, generate moderate pressure penalties, and improve it performance index. In addition, the flow structural full-field patterns confirm and further demonstrate how uniform distributions of the flow in the downstream section of the groove are represented in each of the endwalls. The Nusselt number comparison of the upstream and downstream sections of the test section show the flow full-field behaviours at the downstream sections are uniformly distributed compared to upstream sections. This turbulence distribution improve as the Reynolds number within the channels changes and relative pitch roughness significantly influences the mixing rate within the channel.