| 小流量下转静系盘腔传热特性 |
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| 引用本文： | 林立,吴康,谭勤学,任静,蒋洪德.小流量下转静系盘腔传热特性[J].航空动力学报,2015,30(9):2058-2065. |
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| 作者姓名： | 林立 吴康 谭勤学 任静 蒋洪德 |
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| 作者单位： | 福州大学 石油化工学院 节能技术研究中心, 福州 350116,清华大学 机械工程学院 燃气轮机研究所, 北京 100084,清华大学 机械工程学院 燃气轮机研究所, 北京 100084,清华大学 机械工程学院 燃气轮机研究所, 北京 100084,清华大学 机械工程学院 燃气轮机研究所, 北京 100084 |
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| 基金项目： | 国家自然科学基金(51076076) |
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| 摘 要： | 采用热敏液晶(TLC)瞬态传热实验技术对小流量下的中心进气转静系盘腔传热特性进行研究,介绍了同步触发拍摄系统,考察了流量与转速变化对动盘面传热的影响.结果表明:在所研究工况范围内,流量变化对动盘面中低半径处传热影响较大,对高半径处影响较小;转速升高使动盘面传热效果整体增强;当湍流流动参数较小时,动盘面中高半径区域努塞尔数随半径增大而增大;采用湍流流动参数对动盘面平均努塞尔数进行归纳,实验结果与雷诺相似分析结果的偏差小于15%,一定程度上验证了雷诺相似对转静盘腔传热问题的适用性.
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| 关 键 词： | 转静系盘腔 传热特性 瞬态传热实验 热敏液晶 雷诺相似 |
| 收稿时间： | 2014/3/17 0:00:00 |
Heat transfer characteristics of rotor-stator cavity with small mass flow rate |
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| LIN Li,WU Kang,TAN Qin-xue,REN Jing and JIANG Hong-de.Heat transfer characteristics of rotor-stator cavity with small mass flow rate[J].Journal of Aerospace Power,2015,30(9):2058-2065. |
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| Authors: | LIN Li WU Kang TAN Qin-xue REN Jing and JIANG Hong-de |
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| Institution: | Energy-saving Technology Research Center, School of Chemical Engineering, Fuzhou University, Fuzhou 350116, China,Institute of Gas Turbine, School of Mechanical Engineering, Tsinghua University, Beijing 100084, China,Institute of Gas Turbine, School of Mechanical Engineering, Tsinghua University, Beijing 100084, China,Institute of Gas Turbine, School of Mechanical Engineering, Tsinghua University, Beijing 100084, China and Institute of Gas Turbine, School of Mechanical Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | Thermochromic liquid crystal (TLC) was used in the transient heat transfer experiments of rotor-stator cavity with central inlet and small mass flow rate. The effects of mass flow rate and rotation speed on rotary disk were studied. Results showed that, under the conditions concerned, changes of mass flow rate had a great impact on heat transfer in mid-radius and lower-radius region, and had a less impact on higher-radius region; increase of rotation speed intensified the heat transfer over the rotary disk; Nusselt number over the mid-radius and higher-radius region increased with radius when turbulent flow parameter was low; the experimental results were correlated by turbulent flow parameter and compared with results from Reynolds analogy, and the difference was less than 15%, verifying the applicability of Reynolds analogy on rotor-stator cavity to a certain extent. |
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| Keywords: | rotor-stator cavity heat transfer characteristics transient heat transfer experiment thermochromic liquid crystal Reynolds analogy |
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