ISSN Online: 2688-7231
ISBN Online: 978-1-56700-524-0
Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
Cooling Characteristics of Air Jet Impinging on a Rotating Circular Disk
Study of forced fluid stream impingement on a surface in rotational motion has numerous applications in the field of engineering, such as temperature reduction of blades of gas turbine, deposition of chemicals on textiles, heat treatment of metal or heat transfer in general, and chemical vapour deposition. In the present work, numerical simulation has been attempted for dual symmetric air jets impinging on a rotating disk and related heat transfer characteristics. The basic governing equations of heat transfer along with the k-φ Shear Stress Transport (SST) turbulence model have been solved to simulate the jet impingement heat transfer phenomena. The cooling behaviour and heat transfer characteristics of the heated rotating disk have been studied with respect to variation in the disk angular velocity (Ω), airflow rate (Q), and nozzle to disk surface ratio (H/d). The cooling curves for different disk angular velocities along with the surface temperature variation have been plotted. Also, the spatial variation of the local Nusselt number (Nu) across the impingement zone on the disk has been shown.