Study thermal performance of air Jet Impingement on a Flat Plate

Dhafar Fadhil Ali; sajida lafta ghashim

doi:10.33261/jaaru.2025.32.1.001

Dhafar Fadhil Ali Department of Mechanical Engineering, College of Engineering, University of Baghdad
sajida lafta ghashim Department of Mechanical Engineering, College of Engineering, University of Baghdad

DOI: https://doi.org/10.33261/jaaru.2025.32.1.001

Keywords: Jet impingement, A pore density of the copper foam, Unconfined slot jet, Local Nusselt number, Copper foam.

Abstract

An experimental investigation of thermal performance from a single rectangular slot jet impinging on a copper foam flat plate was carried out. The copper foam of 10 mm thick and 90% porosity is used. The effects of slot-to-plate distance for range from 2 to 8 and Reynolds number for range from 5200 to 14000 are studied. The effects of an increase in the density of pore on the local and average Nusselt number of copper foam flat plate of the density of pore of 10 PPI and 40 PPI is identified. Results showed the most enhancement of local Nusselt number was appeared at copper foam flat plate compared to smooth flat plate. In comparison to the copper foam flat plate with the density of pore of 40 PPI, the copper foam flat plate with the density of pore of 10 PPI exhibits a greater augmentation of the local and average Nusselt number. The effect of slot-to-plate distance on local and average Nusselt number are determined. For the smooth flat plate, the local Nusselt number is increase when slot-to-plate distance is increment. For the copper foam flat plate, it is discovered that flow deflection is more substantial for foams with little slot-to-plate distance and low the density of pore. Therefore, the flow can equally permeate the heat sink when the slot-to-plate distance is increased. Additionally, it is discovered that augmentation in Reynolds number allows the flow to penetrate the porous media more evenly.