Experiment on active clearance control system of high pressure turbine case with thermal deformation control
-
摘要: 设计和搭建了叶尖主动间隙控制系统的核心——可控热变形机匣模型试验验证台,利用机匣温度和变形量等参数的测量,验证了某主动间隙控制设计方案的基本工作特性.试验中通过改变集气腔进气流量,研究了不同试验工况下机匣温度分布规律,获得了机匣径向变形量及其在周向和轴向的分布规律.研究中发现冷却空气管的多孔冲击射流可以有效改变机匣温度,并达到调节机匣变形的最终目的.随着供气雷诺数增加,机匣的热响应时间减小,机匣的收缩速率明显增加,但该增加幅度随着雷诺数的增加而逐步减弱.试验结果表明:机匣径向冷却收缩量基本均匀.由于冷却空气管周向流量分配不均匀,使其周向上最大相对偏差为8.75%.同时冷却空气管结构和供气量差异会导致机匣轴向温度分布不均匀,在该验工况中,机匣径向冷却收缩量在轴向上最大的相对偏差为6.99%.Abstract: An experimental rig was established to get the performance of high pressure turbine case with thermal deformation control, serving as one of the most important parts of active clearance control (ACC) system. The distribution of temperature and radial deformation was measured to show how the turbine case responded to the temperature variation. In experiments, the coolant mass flow rate of inlet was changed, then the information of temperature and radial deformation was recorded. The rules of those parameters varying in axial and circumferential directions were also studied. It was found in experiments that the temperature of case could be controlled with impingements formed by the staggered jet holes in cooling pipes, which were placed outside the case. Therefore the thermal deformations were also controlled due to those jet impingements. With the increase of coolant mass flow, the response time of thermal deformation decreased significantly at first and then tended to be a certain value. The experimental results showed that the radial thermal deformation of case was substantially uniform. But uneven circumferential distribution of coolant jetting from the pipes can still lead to some non-uniformity of radial thermal deformation in circumferential direction. The maximum relative deviation was about 8.75%. At the same time, the case's temperature in axial direction was also affected by the coolant flow and structural parameters. The maximum relative difference of radial deformation in axial direction as 6.99% was observed in experiments.
-
[1] 曾军,王鹏飞.民用航空发动机涡轮叶尖间隙主动控制技术分析[J].航空科学技术,2012,24(2):1-6. ZENG Jun,WANG Pengfei.Analysis on turbine active clearance control technology of civil aircraft engine[J].Aeronautical Science and Technology,2012,24(2):1-6.(in Chinese) [2] Bradbury L J S.The structure of a self-preserving turbulent plane jet[J].Journal of Fluid Mechanics,1965,23(1):31-64. [3] Lattime S B,Steinetz B M.High-pressure-turbine clearance control systems:current practices and future directions[J].Journal of Propulsion and Power,2004,20(2):302-311. [4] Andreini A,Da Soghe R.Numerical characterization of aerodynamic losses of jet arrays for gas turbine applications[J].Journal of Engineering for Gas Turbines and Power,2012,134(5):052504.1-052504.8. [5] Da Soghe R,Andreini A.Numerical characterization of pressure drop across the manifold of turbine casing cooling system[J].Journal of Turbomachinery,2013,135(3):031017.1-031017.9. [6] 姜远刚.间隙主动控制系统中冷却流路的流动/换热特性研究[D].南京:南京航空航天大学,2010. JIANG Yuangang.Research on flow and heat transfer characteristics in air cooling channel of turbine tip active clearance control system[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2013.(in Chinese) [7] 单文娟,毛军逵,李毅,等.斜向冲击强化换热特性试验[J].航空动力学报,2013,28(3):701-708. SHAN Wenjuan,MAO Junkui,LI Yi,et al.Experiment on heat transfer characteristics with inclined impingement[J].Journal of Aerospace Power,2013,28(3):701-708.(in Chinese) [8] Huang Y,Ekkad S V,Han J C.Detailed heat transfer coefficient distributions under an array of inclined impinging jets using a transient liquid crystal technique[R].Singapore:9th International Symposium on Transport Phenomenon in Thermal Fluids Engineering,ISTP-9,1998. [9] Huang Y,Ekkad S V,Han J C.Detailed heat transfer distribution under an array of orthogonal impinging jets[J].Journal of Thermophysics and Heat Transfer,1998,12(1):73-79. [10] 张井山,毛军逵,李毅,等.高压涡轮主动间隙控制机匣内部换热特性试验[J].航空动力学报,2014,29(2):298-304. ZHANG Jingshan,MAO Junkui,LI Yi,et al.Experiment on heat transfer characteristics inside the casing of high pressure turbine with active clearance control[J].Journal of Aerospace Power,2014,29(2):298-304.(in Chinese) [11] Gaffin W O.JT9D-70/59 improved high pressure turbine active clearance control system[R].NASA CR-159661,1979. [12] 《航空航天工业部高效节能发动机文集》编委会.高效节能发动机文集:第5分册 涡轮设计和试验[M].北京:航空工业出版社,1991. [13] Howard W D,Fasching W A.CF6 jet engine diagnostics program high pressure turbine roundness/clearance investigation[R].NASA CR-165581,1982. [14] 牛东生,陈伟,漆文凯.涡轮叶尖间隙计算实现方法与结果分析[ J].燃气涡轮试验与研究,2004,17(4):31-34. NIU Dongsheng,CHEN Wei,QI Wenkai.Calculation program for turbine tip clearance and result analysis[J].Gas Turbine Experiment and Research,2004,17(4):31-34.(in Chinese) [15] 闫明.基于ANSYS的飞机附件机匣热分析[D].沈阳:东北大学,2005. YAN Ming.Thermal analysis to the accessory gearbox based on ANSYS[D].Shenyang:Northeastern University,2005.(in Chinese) [16] 岂兴明,朴英,祝剑虹,等.某型航空发动机高压涡轮叶顶间隙三维数值分析[J].航空动力学报,2008,23(5):904-908. QI Xingming,PIAO Ying,ZHU Jianhong,et al.3-D numerical analysis of the tip clearance of an aero-engine high pressure turbine[J].Journal of Aerospace Power,2008,23(5):904-908.(in Chinese) [17] 贾丙辉,张小栋,彭凯.机动飞行下的涡轮叶尖间隙动态变化规律[J].航空动力学报,2011,26(12):2757-2764. JIA Binghui,ZHANG Xiaodong,PENG Kai.Dynamic changes rule of aero-engine turbine tip clearance in maneuver flight[J].Journal of Aerospace Power,2011,26(12):2757-2764.(in Chinese) [18] 杨家礼,涂孟罴,张亿力,等.一种涡轮叶尖间隙控制技术[J].航空动力学报,2014,29(9):2195-2201. YANG Jiali,TU Mengpi,ZHANG Yili,et al.A tip clearance control technology for turbine[J].Journal of Aerospace Power,2014,29(9):2195-2201.(in Chinese) [19] 杨晓光,黄佳.采用改进缩减模型的涡轮叶尖间隙快速分析方法[J].航空动力学报,2012,27(9):2048-2055. YANG Xiaoguang,HUANG Jia.Modified reduced model for rapid analysis of tip clearance of high pressure turbine[J].Journal of Aerospace Power,2012,27(9):2048-2055.(in Chinese) [20] 李春楠,卢云,兰中文,等.磁致伸缩位移传感器的研究进展[J].实验科学与技术,2008,6(1):10-12. LI Chunnan,LU Yun,LAN Zhongwen,et al.Progress in research of magnetostrictive position sensor[J].Experiment Science & Technology,2008,6(1):10-12.(in Chinese) [21] 吕云腾.高温电涡流位移传感器分析与设计[D].杭州:浙江大学,2014. LV Yunteng.Analysis and design of high-temperature eddy current displacement sensor[D].Hangzhou:Zhejiang University,2014.(in Chinese) [22] 刘焱,王烨.位移传感器的技术发展现状与发展趋势[J].仪器仪表与检测技术,2013,32(6):76-80. LIU Yan,WANG Ye.Present status and thrend of technical development of displacement sensor[J].Instrumentation and Measurment,2013,32(6):76-80.(in Chinese)
点击查看大图
计量
- 文章访问数: 968
- HTML浏览量: 16
- PDF量: 651
- 被引次数: 0