带凹坑楔形通道内射流冲击换热特性实验

蒋新伟; 许卫疆; 朱惠人

doi:10.13224/j.cnki.jasp.2017.12.022

带凹坑楔形通道内射流冲击换热特性实验

doi: 10.13224/j.cnki.jasp.2017.12.022

西北工业大学动力与能源学院，西安 710072

计量
- 文章访问数: 1012
- HTML浏览量: 327
- PDF量: 435
- 被引次数: 0
出版历程
- 收稿日期: 2016-05-14
- 刊出日期: 2017-12-28

Experiment of impingement heat transfer characteristics in dimpled wedge channel

摘要

摘要: 为了获得发动机进气道支板的热气防冰特性，采用热色液晶全表面瞬态测温技术对带凹坑楔形通道内表面开展冲击换热实验。研究了射流雷诺数，凹坑间距，射流入口到凹坑的距离和凹坑排数对壁面努塞尔数分布和大小的影响。结果表明：带凹坑壁面的平均换热效果要强于光滑壁面，两者的努塞尔数均随雷诺数的增加而增大。壁面的局部努塞尔数在凹坑尾缘出现一个峰值，凹坑间距越小，侧壁的平均换热效果越强。在小雷诺数时，凹坑的位置靠近出口缝，能够较大的增强侧壁的换热；在较大雷诺数时，凹坑位置越靠近前缘，则越能增强前缘的换热效果。当凹坑的排数增加，壁面的平均努塞尔数增大。
- 射流冲击 /
- 凹坑 /
- 强化换热 /
- 防冰 /
- 进口支板
Abstract: In order to obtain the hot air antiicing properties of engine inlet strut, an impingement heat transfer experiment was carried out in a dimpled wedge channel with use of transient thermochromic liquid crystal measurement technique. The effects of jet Reynolds number (Re), distance between jet entrance and dimple, dimple space and the number of dimple rows on Nusselt number (Nu) were studied. The results shows that Nu increases with the increasing Reynolds number, and the heat transfer of dimpled wall is stronger than that of smooth wall. Local Nusselt number reaches a maximum at the trailing edge of the dimple. The average heat transfer effect of side walls increases when the dimple space decreases. When the dimples are close to the outlet, there is an obvious enhancement to the side wall Nu at small Re, while the heat transfer at the leading edge is enhanced at relative large Re. When the number of dimple rows increases, the average Nu increases.
- impingement /
- dimple /
- heat transfer enhancement /
- antiicing /
- inlet strut

HTML

参考文献(20)

[1]	GOLDSTEIN R J,BEHBAHANI A I.Impingement of a circular jet with and without cross flow［J］.International Journal of Heat and Mass Transfer,1982,25(25):1377-1382.
[2]	GOLDSTEIN R J,SOBOLIK K A,SEOL W S.Effect of entrainment on the heat transfer to a heated circular air jet impinging on a flat surface［R］.International Journal of Heat Transfer,1990,33(3):608-611.
[3]	GOLDSTEIN R J,SEOL W S.Heat transfer to a row of impinging circular air jets including the effect of entrainment［J］.International Journal of Heat and Mass Transfer,1991,34(8):2133-2147.
[4]	MOKHTAR W.Aerodynamics of the inclined offset turbulent jets［R］.AIAA 2006-911,2006.
[5]	谭蕾,张靖周,杨卫华.半封闭肋化通道射流冲击的实验［J］.航空动力学报,2008,23(9):1678-1683.TAN Lei,ZHANG Jingzhou,YANG Weihua.Experimental research on jet impingement inside semi confined ribroughed channel［J］.Journal of Aerospace Power,2008,23(9):1678-1683.(in Chinese)
[6]	周雷声,朱惠人,杨祺,等.带射流的收缩型通道内部换热特性液晶瞬态实验［J］.航空学报,2010,31(1):35-40.ZHOU Leisheng,ZHU Huiren,YANG Qi,et al.Internal heat transfer experiment with liquid crystal transient technique in contraction channel with jet［J］.Acta Aeronautica et Astronautica Sinica,2010,31(1):35-40.(in Chinese)
[7]	周雷声,朱惠人,张霞,等.几何参数对带射流收缩型通道换热特性影响的液晶瞬态实验［J］.航空动力学报,2010,25(8):1698-1704.ZHOU Leisheng,ZHU Huiren,ZHANG Xia.et al.Experiment of the effects of geometrical parameters on internal heat transfer in an impinging contraction channel with liquid crystal transient technique［J］.Journal of Aerospace Power,2010,25(8):1698-1704.(in Chinese)
[8]	王克菲,朱惠人,张斌,等.带气膜孔出流和侧向出流的冲击换热实验［J］.航空动力学报,2010,25(5):1011-1017.WANG Kefei,ZHU Huiren,ZHANG Bin,et al.Experiment of impingement heat transfer with film holes bleeding and side bleeding［J］.Journal of Aerospace Power,2010,25(5):1011-1017.(in Chinese)
[9]	吴宏,刘裕盛,徐国强.带前缘冲击复杂叶片内冷通道换热特性实验［J］.航空动力学报,2011,26(12):2641-2647.WU Hong,LIU Yusheng,XU Guoqiang.Experimental investigation on heat transfer in complex internal cooling blade channel with leadingedge［J］.Journal of Aerospace Power,2011,26(12):2641-2647.(in Chinese)
[10]	单文娟,毛军逵,李毅,等.斜向冲击强化换热特性试验［J］.航空动力学报,2013,28(3):701-708.SHAN Wenjuan,MAO Junkui,LI Yi,et al.Experiment on heat transfer characteristics with inclined impingement［J］.Journal of Aerospace Power,2013,28(3):701-708.(in Chinese)
[11]	SCHUKIN A V,KOSLOV A P,AGACHEV R S.Study and application of hemispherical cavities for surface heat transfer augmentation［R］.ASME Paper 95-GT-59,1995.
[12]	MAHMOOD G I,HILL M L,NELSON D L,et al.Local heat transfer and flow structure on and above a dimpled surface in a channel［J］.Journal of Turbomachinery,2000,123(1):115-123.
[13]	BURGESS N K,LIGRANI P M.Effects of dimple depth on nusselt numbers and friction factors for internal cooling in a channel［R］.ASME Paper GT2004-54232,2004.
[14]	LIGRANI P M,BURGESS N K,WON S Y.Nusselt numbers and flow structure on and above a shallow dimpled surface within a channel including effects of inlet turbulence intensity level［R］.ASME Paper GT2004-54231,2004.
[15]	MOON S W,LAU S C.Turbulent heat transfer measurements on a wall with concave and cylindrical dimples in a square channel［R］.ASME Paper GT2002-30208,2002.
[16]	SYRED N,KHALATOV A,KOZLOV A,et al.Effect of surface curvature on heat transfer and hydrodynamics within a single hemispherical dimple［J］.Journal of Turbomachinery,2001,123(3):609-613.
[17]	AZAD G S,HUANG Y,HAN J C.Jet impingement heat transfer on dimpled surfaces using a transient liquid crystal technique［J］.Journal of Thermophysics and Heat Transfer,2000,14(2):186-193.
[18]	ANDERSON A M,CHAPIN D M.The effects of dimpled surface geometry on heat transfer in an impinging jet flow［J］.Internation Mechanical Engineering Congress and Exposition,2002,372(2):73-80.
[19]	郭涛,朱惠人,许都纯,等.热色液晶瞬态测量全表面换热系数的技术研究［J］.测控技术,2006,25(9):67-69.GUO Tao,ZHU Huiren,XU Duchun,et al.Research on transient measurement of heat transfer coefficient distribution with liquid crystal technique［J］.Measurement and Control Technology,2006,25(9):67-69.(in Chinese)
[20]	YAN Y,OWEN J M.Uncertainties in transient heat transfer measurements with liquid crystal［J］.International Journal of Heat and Fluid Flow,2002,23(1):29-35.