CAREER: Characterization of Liquid Sprays Impacting Hot Surfaces in Cooling Applications: Emphasis on the Pre-Impact Process

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ABSTRACT The proposed research seeks to characterize liquid sprays impacting hot surfaces in cooling applications. The emphasis is on the pre-impact process and sprays with droplets that are less than 150 mm in diameter. Sprays with such fine droplets are more susceptible to the influence of the surrounding conditions. The goal of the project is to determine the optimal conditions for achieving maximum stable high heat flux in spray cooling applications. Experiments will be conducted to measure the droplet velocity, size, and temperature under different conditions. Innovative techniques such as the Exciplex Fluorescence Technique will be used to measure the temperature of in-flight droplets. Finite difference simulations will be carried out using a k-e model to describe gas phase turbulence. The educational plan includes participation of undergraduate students in the project and integration of the knowledge gained from the research into existing courses.