航空学报 > 2003, Vol. 24 Issue (5): 405-410

层板结构内部换热特性的研究

郁新华1, 全栋梁1, 刘松龄1, 许都纯1, 胡主根2   

  1. 1. 西北工业大学706 教研室, 陕西西安 710072;2. 洪都航空工业集团飞机设计所, 江西南昌 330024
  • 收稿日期:2002-10-28 修回日期:2003-03-24 出版日期:2003-10-25 发布日期:2003-10-25

Investigation of the Internal Heat Transfer Characteristics of Lamilloy

YU Xin-hua1, QUAN Dong-liang1, LIU Song-ling1, XU Du-chun1, HU Zhu-gen2   

  1. 1. Faculty 706; Northwestern Polytechnic University; Xi'an 710072; China;2. The Aircraft Design Institute; Hongdu Aviation Industry Group; Nanchang 330024; China
  • Received:2002-10-28 Revised:2003-03-24 Online:2003-10-25 Published:2003-10-25

摘要: 在已研究流阻特性的基础上,通过改变扰流柱柱高、柱形,对两种类型结构的层板进行内表面换热系数的测量、分析。层板内表面上的换热系数随冲击距离的减小而增大,随冲击孔间距的增大而减小。方形扰流柱的换热情况要稍好于菱形扰流柱、圆形扰流柱,并且柱子高低对流场影响很大,尤其是C 型绕流方案。基于换热体积和换热面积之比特性尺寸的努谢特数与冲击雷诺数之间成对数线性关系,并整理出准则关系。

关键词: 层板, 扰流柱, 内通道表面, 换热特性

Abstract: Two typical internal flow patterns are chosen to carry out the internal heat transfer experiments based onthe fronter fluid flow characteristics. By changing the height and type of the pin-fins, the internal heat transfer onthe boards can be learned. The heat transfer coefficients decrease when increasing jet spacing and the distance fromthe jet to the target . The square shaped pin fins produce the highest internal heat transfer, followed by diamond andcircular pins. The variation of the height of the channel has effects on the fluid flow, and shows different heat transfer coefficient distributions. The Nusselt number based on the length scale of the ratio internal volume to heat transfer surface increases with the impingement Reynolds number. Nusselt number is shown to be linear on a log-log scalewith Reynolds number.

Key words: lamilloy, pin-fins, internal surface, heat transfer characteristics

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