An experimental investigation of free and submerged miniature liquid jet array impingement heat transfer

Liquid water jet impingement cooling was investigated experimentally for both free-surface jet arrays and confined submerged jet arrays. The jet arrays consisted of straight holes of 1.0mm diameter arranged in rectangular arrays with spacings of 3, 5 and 7 jet diameters between adjacent jets. For the impingement surface area of 780mm2, these jet array configurations can be considered well populated, with a total of 21, 45 and 121 jets impinging …