Multiple Jet Impingement Cooling of Heated Surface by Alteration of Fluid
摘要
The current research describes an experimental investigation on laminar multiple jet impingement cooling of steel plate using different impinging fluids such as water, nanofluids, and soluble oil. The experiments were assisted on a hot steel sheet with aspects of 200 mm × 200 mm × 6 mm. Three different concentrations of nanofluids (namely TiO2, Al2O3 and CuO) were prepared. Commercially available showers of different configurations were used to generate array of laminar jets. The ruling variables contemplated in the dossiers were fluid pressure, fluid temperatures, types of nanofluids, concentration of nanofluids, and shower outlet to plate surface length, respectively. The influence of these variables on cooling rate was investigated and compared individually for each fluid. The outcomes revealed a drastic enhancement of heat transfer from the heated sheets with the addition of nanoparticles which were more effective to drawn out heat from the hot surface. Experimental data also disclosed that use of nanoparticles with the base fluid dramatically embellished the heat transfer coefficient. The transient temperature data were utilized for computation of cooling rate. The results revealed that TiO2 nanofluids had better thermal performance for 0.05% weight concentrations by using the circular shower head for 120 mm jet to plate distance for cooling applications. The mediocre enhancement in cooling performance of the shower cooling arrangement was observed to be 10.53% for TiO2 that of Al2O3 was 7.693% and 5.11% for CuO nanofluids as related to water.