Abstract

This paper describes the design and development of a facility for the study of jet impingement heat transfer. The facility was designed to teach undergraduate students about the relation between fluid mechanics and convective heat transfer. It consists of a heated surface mounted perpendicular to a 9.8 by 3.8 cm slot jet nozzle on an adjustable base. A small compact blower serves as the air supply and is also mounted on the base. The jet to surface gap distance can be varied from 0 to 25 cm and the jet velocity can be varied from 2 to 15 m/s. The system uses particle image velocimetry (PIV) to measure the impinging flow velocities and liquid crystal thermography (LCT) to measure the temperatures on the heated surface. This paper will discuss the design constraints, the design options, and several analyses used to size the jet nozzle and the heat transfer surface. The final design will be presented as well as some typical PIV and LC results which illustrate the jet impingement cooling phenomena.

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