Effects of Mach number and Reynolds number on jet array impingement heat transfer

Influence of spanwise pitch on local heat transfer distribution for in-line arrays of circular jets with spent air flow in two opposite directions

“…More recently, as in Baily and Bunker [16], Wang et al [17], Facchini and Surace [18] and Esposito and Ekkad [19] liquid crystal thermography is used to study local heat transfer distribution due to impingement of arrays of multiple jets with spent air exiting in one direction. Goodro et al [20] and Park et al [21] used thin-foil technique and IR camera to investigate the effects of Mach number and Reynolds number on heat transfer due to jet array impingement. The distribution of heat transfer coefficient due to arrays of impinging jets involving increase in spacing between jets in streamwise direction and increase in jet hole diameters in the streamwise direction using liquid crystal thermography are studied by Gao et al [22].…”

Numerical Characterization of Pressure Drop Across the Manifold of Turbine Casing Cooling System

“…Quite interesting results on jet array impingement systems have been recently pointed out by Goodro and coworkers [12][13][14][15][16]. The authors reveal that the holes' discharge coefficient is affected by both jet Reynolds and Mach number.…”

Glass tempering heat transfer coefficient evaluation and air jets parameter optimization

“…However, the experimental correlations of Martin may not be used if the jets emanate from sharp-edged orifices (this is the case of blowers used for glass tempering) instead of bell-shaped nozzles, and both correlations (Martin and Gardon) are not useful in evaluating the uniformity of the cooling process -crucial for the Quality of the tempered glass -for which it is necessary to calculate the values of the local heat transfer coefficient, for the same conditions. Furthermore, the information about the local and average heat transfer coefficients, supplied in the papers reviewed, are valid for experimental parameter values dissimilar to that considered in the glass tempering process.The only authors that supply information at Re number closer to that considered in the present work are Goodro et al (16). In their work they investigate the effect of Re number (up to 60,000) and Mach number separately, holding one of these parameter constant as the other one is varied.…”