| 液晶在冲击冷却研究中的应用 |
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| 引用本文： | 李立国,张东来,江军.液晶在冲击冷却研究中的应用[J].航空学报,1988,9(6):284-290. |
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| 作者姓名： | 李立国 张东来 江军 |
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| 作者单位： | 南京航空学院
(李立国，张东来)，南京航空学院(江军) |
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| 摘 要： | 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。
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| 关 键 词： | |
| 收稿时间： | 1987-06-22; |
APPLICATION OF LIQUID CRYSTALS TO IMPINGEMENT COOLING RESEARCH |
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| Li Liguo,Zhang Donglai and Jiang Jun.APPLICATION OF LIQUID CRYSTALS TO IMPINGEMENT COOLING RESEARCH[J].Acta Aeronautica et Astronautica Sinica,1988,9(6):284-290. |
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| Authors: | Li Liguo Zhang Donglai and Jiang Jun |
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| Institution: | Nanjing Aeronautical Institute |
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| Abstract: | Making use of cholesteric liquid crystals which change color with temperature, the impingement cooling for an array of 7 10 holes in diameter of 2.4mm with nondimensional hole spacing of x/d=5, y/d= 6.67 was experimentally Investigated. When nondimensional distances z/d between holes with both in-line and staggered arrangement and impinging surface are 1.08, 2.16 and 3.25, the results of thermal visualization show that for the same condition of flow the relative cooling effectiveness of inline arrangement is higher than that of staggered one, and the distance of z/d=2.16 gives the greatest heat tran-sfer effectiveness. The isograms of heat transfer coefficients of impingement cooling are also obtained. |
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| Keywords: | heat transfer liquid crystals impingement cooling |
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