The design and validation of an impinging jet test facility.
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Robertson, Peter R.
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An experimental jet impingement facility was constructed with the capability of conducting a detailed analysis of the local heat transfer coefficients beneath an array of large impinging jets. The facility was validated with initial heat transfer studies that determined an appropriate jet discharge coefficient of 0.802 and created a correlation relating local jet Reynolds number and stagnation point heat transfer. The correlation matched closely with previous studies. The thermal effects of impinging jets were visualized by liquid crystal thermography. The resulting thermal footprints of downstream jets revealed the first known documented case of the heat transfer effects of horseshoe vortices on the target surface. This phenomenon was identified and discussed.