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本文利用胆甾型液晶的温色效应,对孔径d=2.4mm,孔间距比xn/d=5,yn/d=6.67的7×10个射孔的多股射流冲击冷却进行了试验研究。在同一个总射流流量下,当孔排方式为顺排和叉排,孔至靶面的距离Z/d=1.08,2.16,3.25时,热图象显示的结果表明:顺排孔的冲击冷却效果比叉排的好,乳至靶面的距离在Z/d=2.16时的冷却效果最好。同时也获得了多股射流冲击冷却的对流换热系数等值线谱图。
In this paper, the multi-jet impact cooling of 7 × 10 perforations with a diameter of d = 2.4 mm and a hole pitch ratio of xn / d = 5 and yn / d = 6.67 was studied by using the temperature- At the same total jet flow rate, when the perforation is in the row and the fork row, the distance from the hole to the target is Z / d = 1.08, 2.16, 3.25, the results of the thermal image show that the percussion cooling The effect is better than the fork row, the distance from the milk to the target at Z / d = 2.16, the cooling effect is best. At the same time, it also obtained the isoconcentration spectrum of convection heat transfer coefficient of multi-jet impingement cooling.