Experimental and Numerical Study on Jet Impingement Cooling on a Rotating Disc with Localized Heating
摘要
Rotating discs subjected to jet impingement are crucial in various industrial applications, such as spray coating and gas turbine blade manufacturing. It is essential to address the challenges of localized heating on rotating discs to design systems that effectively balance load and heat transfer constraints. For instance, in brake mechanisms, increased frictional torque during braking generate local heat making rapid heat dissipation necessary to avoid premature wear, thermal distortion, and brake fluid vaporization. Efficient heat dissipation within the disc assembly is vital for optimizing braking system performance and relies on the material’s thermal properties. While most research focuses on continuous or intermittent jet impingement cooling under uniform heating conditions, practical applications often involve non-uniform heating scenarios, as seen in brake systems. This study aims to investigate how an axial impingement jet affects the local heat transfer coefficient on a rotating disc subjected to localized heating. The computational analysis employs a numerical finite-volume method to examine the thermal and heat transfer characteristics of a rotating disc with localized jet impingement heating. Meticulous validation procedures are applied to the experimental dataset to ensure the accuracy and reliability of the results. It has been observed that the location of the re-circulation region outside the rotating disc varies depending on the different heat transfer locations on the disc.