| 转速非稳态变化对中心进气旋转盘平均换热的影响 |
| |
| 引用本文： | 罗翔,王建宁,徐国强.转速非稳态变化对中心进气旋转盘平均换热的影响[J].航空动力学报,2000,15(3):282-285,290. |
| |
| 作者姓名： | 罗翔 王建宁 徐国强 |
| |
| 作者单位： | 北京航空航天大学402教研室,北京,100083 |
| |
| 摘 要： | 实际的中心进气涡轮盘被简化成中心进气外缘加热的旋转盘模型,以实验的方法研究了涡轮旋转盘附近冷气在非定常情况下的流动与换热特性,主要是转速变化对盘面温度和盘面的平均努赛尔特数的影响.转盘的有效半径为200 mm,最大转速为3000 r/min,加热功率为1000 W.实验结果表明:盘缘区域温度随时间的变化率大于中心区域温度随时间的变化率;转速增加使盘面平均努赛尔特数增大;在给定时间内转速增至最大后使系统稳定还是分段使系统稳定后再增加转速,对盘面平均努赛尔特数的影响不是特别明显.
|
| 关 键 词： | 转速 盘 换热 流动 |
| 收稿时间： | 1999/8/31 0:00:00 |
| 修稿时间： | 1999-08-31 |
Transient Heat Transfer Characteristics of Shrouded Rotating Disk with Variation of Rotating Speed |
| |
| Luo Xiang,Wang Jianning and Xu Guoqiang.Transient Heat Transfer Characteristics of Shrouded Rotating Disk with Variation of Rotating Speed[J].Journal of Aerospace Power,2000,15(3):282-285,290. |
| |
| Authors: | Luo Xiang Wang Jianning and Xu Guoqiang |
| |
| Institution: | 4th Dept.Beijing University of Aeronautics and Astronautics,Beijing 100083,China;4th Dept.Beijing University of Aeronautics and Astronautics,Beijing 100083,China;4th Dept.Beijing University of Aeronautics and Astronautics,Beijing 100083,China |
| |
| Abstract: | A gas turbine disk was simplified to be a shrouded rotating disk system with central cooling air inflow,the disk was heated at rim.Transient heat transfer characteristics of the disk were investigated experimentally as the rotating speed was varied.The disk diameter was 400 mm and its maximus rotating speed was up to 3000 r/min.The results show that the rate of temperature vs time at large radium is greater than that at small radius.Averaged Nusselt number enlarges with the increase of Rotational Reynolds number.There are no significant difference in averaged Nusselt number between the stepwise abrupt variation and linear variation in the rotating speed. |
| |
| Keywords: | rotation speed rotating disk heat transfer flow |
| 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 |
|
