| 转子叶片径向受限的“冲击-气膜出流”冷却结构流动与换热 |
| |
| 引用本文： | 张镜洋,常海萍,徐磊.转子叶片径向受限的“冲击-气膜出流”冷却结构流动与换热[J].推进技术,2011,32(1):125-129,139. |
| |
| 作者姓名： | 张镜洋 常海萍 徐磊 |
| |
| 作者单位： | 南京航空航天大学,能源与动力学院,江苏,南京,210016 |
| |
| 摘 要： | 为揭示转子叶片径向受限的"冲击-气膜出流"冷却结构流动换热规律,以某型双层壁叶片肋化分割形成的冷却单元为研究对象,通过数值模拟的方式,对冲击雷诺数Rej,旋转数Ro,无因次温比(Tw-Tf)/Tw等参数变化下流场和换热特性变化规律展开研究。结果表明:在哥氏力和离心力作用下,受限空间内存在射流偏转、径向二次流动以及二次冲击等现象;流动的径向受限可抑制射流偏转,强化冲击换热;相同的旋转数Ro下,逆转向冲击(叶背区)换热努赛尔数Nu比顺转向冲击(叶盆区)高8%。在研究的参数范围内,数值模拟和试验结果说明径向受限周向出流结构能有效的抑制旋转对换热的削弱。
|
| 关 键 词： | 冲击冷却 旋转 涡轮叶片冷却 航空推进 换热特性 流动特性 |
| 收稿时间： | 2009/12/3 0:00:00 |
| 修稿时间： | 2009/6/17 0:00:00 |
Flow and heat transfer characteristics of "impingement-film cooling" configuration in limited space of rotating blade |
| |
| ZHANG Jing-yang,CHANG Hai-ping and XU Lei.Flow and heat transfer characteristics of "impingement-film cooling" configuration in limited space of rotating blade[J].Journal of Propulsion Technology,2011,32(1):125-129,139. |
| |
| Authors: | ZHANG Jing-yang CHANG Hai-ping and XU Lei |
| |
| Institution: | ZHANG Jing-yang,CHANG Hai-ping,XU Lei(Coll.of Energy and Power,Nanjing Univ.of Aeronautics and Astronautics,Nanjing 210016,China) |
| |
| Abstract: | In order to obtain the rule of flow and heat transfer of impingement-film cooling configuration in limited space of rotating blade,numerical investigation was carried out to study the effects of jet Reynolds numbers Rej,rotation numbers Ro and wall-to-jet temperature difference ratios(Tw-Tf)/Tw.The results show that in the cooling cell,there is deflexion of impinging flow,secondary flow due to Coriolis and centrifugal forces and so on.Besides,the limited space and sparse film cooling stream can increase hig... |
| |
| Keywords: | Impinging cooling Rotation Cooling of turbine blade Aerospace propulsion system Heat transfer characteristic Fluid characteristic |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《推进技术》浏览原始摘要信息 |
| 点击此处可从《推进技术》下载免费的PDF全文 |
|
