Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.
Impinging jets against surface provide effective heat transfer in various industrial applications. It includes vast applications such as gas turbine cooling, rocket launcher cooling, heat treatment, cooling of electronic components, heating of optical surfaces for defogging, cooling of turbine components, cooling of critical machinery structures, and many other industrial processes. In this work, the numerical analysis of various heat transfer configurations of jet impingement on a semi-circular surface was studied. These heat transfer configurations were compared on the basis of effective heat transfer by achieving higher Nusselt number as convection is becoming the dominant phenomenon. The internal channel, on which analysis is performed, is a curved surface with a uniform heat flux. The numerical result obtained is favorably comparable with the experiment results. Furthermore, sensitivity study for various materials, configuration (geometry) and conditions was carried out to gain more insight on the underlining physics of the flow. Finally, the favorable application of inner cooling to turbine blade is numerically demonstrated.
