| 涡轮叶片内部沿周边分布的竹节孔换热特性 |
| |
| 引用本文： | 李娜,吉洪湖,杨超.涡轮叶片内部沿周边分布的竹节孔换热特性[J].航空动力学报,2009,24(1):38-43. |
| |
| 作者姓名： | 李娜 吉洪湖 杨超 |
| |
| 作者单位： | 南京航空航天大学,能源与动力学院,南京,210016 |
| |
| 摘 要： | 根据发动机涡轮叶片内部沿周边分布的竹节孔冷却通道结构建立了简化的传热分析模型.首先通过无量纲分析得到了竹节孔的平均努塞尔数不仪与雷诺数和普朗特数有关,还与"竹节"形状、通道外壁形状以及流体和固体的导热系数比等参数有关.然后,对雷诺数和冷却通道儿何参数对竹节孔平均努塞尔数的影响进行了数值模拟研究,计算并对比了上述参数对平均努塞尔数的影响规律,结果表明:①"竹节"结构使平均努塞尔数显著增大,而通道外壁形状主要影响了局部热流密度和局部努塞尔数的分布情况;②随着"竹节"的节高/孔径比的增加,平均努塞尔数单调增大,阻力系数也随之增大;③可通过增大雷诺数和优化节距/节高比来提高竹节孔的平均努塞尔数,计算表明最佳节距/节高比约为10.
|
| 关 键 词： | 涡轮叶片 冷却 竹节孔 对流换热 努摩尔数 |
| 收稿时间： | 2007/12/19 0:00:00 |
| 修稿时间： | 2008/4/18 0:00:00 |
Study of heat transfer of turbulated cooling holes distributed close along the periphery of the aerofoil of turbine blade |
| |
| LI N,JI Hong-hu and YANG Chao.Study of heat transfer of turbulated cooling holes distributed close along the periphery of the aerofoil of turbine blade[J].Journal of Aerospace Power,2009,24(1):38-43. |
| |
| Authors: | LI N JI Hong-hu and YANG Chao |
| |
| Institution: | College of Energy and Power Engineering;Nanjing University of Aeronautics and Astronautics;Nanjing 210016;China |
| |
| Abstract: | A simplified heat transfer model was extracted from the turbulated cooling holes located close to the periphery of the aerofoil of a turbine blade.The turbulators of the holes are ring ribs with rectangular cross section.By dimensional analysis,it is shown that the Nusselt number of the cooling holes was affected not only by Reynolds and Prandtl numbers,but also by the geometry of the turbulator,the distance between the hole and the outer surface of the blade,and the ratio of fluid conductivity to solid con... |
| |
| Keywords: | turbine blade cooling turbulated cooling holes convective heat transfer Nusselt number |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
| 点击此处可从《航空动力学报》下载免费的PDF全文 |
|
