Image enhancement acquisition method with short exposure based on CCD camera for rotor PSP
-
摘要:
针对转子光学压敏测量技术的需求，提出了基于CCD（charge-coupled device）相机的转子短曝光图像增强采集方法，并组建了相应的测量系统，采用两种方法（短曝光图像增强采集与瞬态图像采集）的9个曝光时间对转速为2700 r/min小型风扇转子叶片进行了图像采集。实验结果表明：该转子短曝光增强采集方法和测量系统可有效提升转子图像质量；转子短曝光图像增强采集得到的旋转状态图像模糊长度小于4像素时，实现图像“无运动模糊”采集；采集次数满足静止图像曝光时间与旋转图像曝光时间之比时，旋转状态图像亮度与静止状态图像相当。
Abstract:In view of the requirements of rotor pressure sensitive paint measurement technology, an image enhancement acquisition method with short exposure for rotor based on a charge-coupled device (CCD) camera was proposed, and a corresponding measurement system was established. Two methods (short-exposure image enhancement acquisition and transient image acquisition) of 9 exposure cases were implemented on the rotor blades of a small-scale fan at 2700 r/min. The experimental results showed that the rotor enhanced acquisition method with short exposure, and the measurement system , can effectively improve the rotor image quality; “no motion blur” image can be achieved when the blur length of the rotating image obtained by using the image enhancement acquisition method with short exposure of the rotor was less than 4 pixels; the brightness of the rotating state image was equivalent to that of the static image when the number of acquisitions equalled to the ratio of static image exposure time to rotating state image exposure time.
-
Key words:
- rotating machinery /
- CCD camera /
- short exposure /
- image enhancement acquisition /
- times of acquisition
-
图 2 转子短曝光图像增强采集方法
Figure 2. Enhancement acquisition method with short exposure for rotor
图 4 被测银色喷漆叶片及锁相反光贴片
Figure 4. Blade with silver paint and reflective patch for phase locking
图 9 短曝光图像增强采集的运动模糊长度
Figure 9. Motion blur length of enhancement acquisition with short exposure
表 1 图像采集方案
Table 1. Cases of image acquisition
序号 $ {t}_{\mathrm{r}} $/${\text{μs} }$ N 短曝光图像增强采集 常规瞬态图像采集 1 0.5 540 1 2 2 135 1 3 5 54 1 4 10 27 1 5 18 15 1 6 27 10 1 7 45 6 1 8 54 5 1 9 67.5 4 1 
下载: 导出CSV
-
[1] DICKENS T,DAY I. The design of highly loaded axial compressors[J]. Journal of Turbomachinery,2011,133(3): 031007.1-031007.10. [2] 王庆伟,刘波,侯为民,等. 压气机转子叶片表面动态压力测量的探索[J]. 航空动力学报,2010,25(10): 2327-2332.WANG Qingwei,LIU Bo,HOU Weimin,et al. Tentative research about pressure measurement on one point of compressor rotor blade surface[J]. Journal of Aerospace Power,2010,25(10): 2327-2332. (in Chinese) [3] 张帅,张强波,张霞妹. 基于方差分析的航空发动机风扇叶片外物撞击识别[J]. 航空学报,2021,42(5): 187-198.ZHANG Shuai,ZHANG Qiangbo,ZHANG Xiamei. Identification of foreign object impact on aero-engine fan blades with variance analysis[J]. Acta Aeronautica et Astronautica Sinica,2021,42(5): 187-198. (in Chinese) [4] REID L, MOORE R D. Performance of single-stage axial-flow transonic compressor with rotor and stator aspect ratios of 1.19 and 1.26, respectively, and with design pressure ratio of 1.82[R]. NASA Technical Paper 1338, 1978. [5] 向宏辉,蒋世奇,高杰,等. 跨声速压气机转子叶尖间隙流动失稳试验研究[J]. 燃气涡轮试验与研究,2018,31(3): 5-13.XIANG Honghui,JIANG Shiqi,GAO Jie,et al. Experimental investigation of rotor tip clearance flow instability in transonic axial flow compressor[J]. Gas Turbine Experiment and Research,2018,31(3): 5-13. (in Chinese) [6] LIU T, TORGERSON S, SULLIVAN J, et al. Rotor blade pressure measurement in a high speed axial compressor using pressure and temperature sensitive paints[R]. AIAA1997-162, 1997. [7] NAVARRA K R. Development of the pressure-sensitive-paint technique for advanced turbomachinery applications[D]. Blacksburg, US: Virginia Polytechnic Institute and State University, 1997. [8] BENCIC T. Rotating pressure and temperature measurements on scale-model fans using luminescent paints[R]. AIAA 1998-3452, 1999. [9] GREGORY J. Porous pressure-sensitive paint for measurement of unsteady pressures in turbomachinery[R]. Reston, US: the 42nd AIAA Aerospace Sciences Meeting and Exhibit, 2004. [10] AHN J,SCHOBEIRI M T,HAN J C,et al. Film cooling effectiveness on the leading edge region of a rotating turbine blade with two rows of film cooling holes using pressure sensitive paint[J]. Journal of Heat Transfer,2006,128(9): 879-888. doi: 10.1115/1.2241945 [11] WONG O, WATKINS A, INGRAM J. Pressure sensitive paint measurements on 15% scale rotor blades in hover[R]. Reston, US: the 35th AIAA Fluid Dynamics Conference and Exhibit, 2005. [12] KAMEYA T,MATSUDA Y,YAMAGUCHI H,et al. Pressure-sensitive paint measurement on co-rotating disks in a hard disk drive[J]. Optics and Lasers in Engineering,2012,50(1): 82-86. doi: 10.1016/j.optlaseng.2011.06.022 [13] 陈柳生,周强,金熹高,等. 压力敏感涂料及其测量技术[J]. 航空学报,2009,30(12): 2435-2448.CHEN Liusheng,ZHOU Qiang,JIN Xigao,et al. Pressure-sensitive paint and its measuring technique[J]. Acta Aeronautica et Astronautica Sinica,2009,30(12): 2435-2448. (in Chinese) [14] 高丽敏,王欢,刘波,等. 测量系统特性对压敏涂料校准影响的实验研究[J]. 航空学报,2010,31(1): 76-81.GAO Limin,WANG Huan,LIU Bo,et al. Experimental of study influence of measurement system characteristics on pressure-sensitive paint calibration[J]. Acta Aeronautica et Astronautica Sinica,2010,31(1): 76-81. (in Chinese) [15] 祝勇,董哲,彭迪,等. 压力敏感涂料PSP宽域(1~600 kPa)静态标定方法研究[J]. 实验流体力学,2021,35(3): 69-76.ZHU Yong,DONG Zhe,PENG Di,et al. A study of a wide range (1—600 kPa) static calibration method for pressure sensitive paints[J]. Journal of Experiments in Fluid Mechanics,2021,35(3): 69-76. (in Chinese) [16] 李国帅,周强,马护生,等. 基于预先校准的压力敏感涂料图像处理方法[J]. 空气动力学学报,2014,32(2): 197-202.LI Guoshuai,ZHOU Qiang,MA Husheng,et al. Image processing methods of pressure sensitive paint based on prior calibration[J]. Acta Aerodynamica Sinica,2014,32(2): 197-202. (in Chinese) [17] 张永存,陈柳生,阎莉,等. 压敏涂料技术在风洞中的应用研究[J]. 实验流体力学,2010,24(1): 74-78, 94.ZHANG Yongcun,CHEN Liusheng,YAN Li,et al. Investigation and application of pressure sensitive paint technique in wind tunnel test[J]. Journal of Experiments in Fluid Mechanics,2010,24(1): 74-78, 94. (in Chinese) [18] 张雪,衷洪杰,王猛,等. 跨声速叶栅叶片快速响应PSP测量研究[J]. 空气动力学学报,2019,37(4): 586-592, 599.ZHANG Xue,ZHONG Hongjie,WANG Meng,et al. Fast response pressure-sensitive paint measurement of transonic cascades[J]. Acta Aerodynamica Sinica,2019,37(4): 586-592, 599. (in Chinese) [19] 刘祥,熊健,黄辉,等. 基于0.6 m量级三声速风洞的压敏漆试验技术[J]. 航空学报,2020,41(7): 134-142.LIU Xiang,XIONG Jian,HUANG Hui,et al. Experimental technique of pressure sensitive paint based on 0.6 m trisonic wind tunnel[J]. Acta Aeronautica et Astronautica Sinica,2020,41(7): 134-142. (in Chinese) [20] 李佳,韩昌,任静,等. 基于压敏漆的带横槽气膜冷却实验与数值研究[J]. 工程热物理学报,2010,31(2): 239-242.LI Jia,HAN Chang,REN Jing,et al. Film cooling performance of the embedded holes in trenches with compound angles[J]. Journal of Engineering Thermophysics,2010,31(2): 239-242. (in Chinese) [21] PENG Di,JIAO Lingrui,YU Yuelong,et al. Single-shot lifetime-based PSP and TSP measurements on turbocharger compressor blades[J]. Experiments in Fluids,2017,58(9): 1-15. [22] JULIANO T J,KUMAR P,PENG Di,et al. Single-shot, lifetime-based pressure-sensitive paint for rotating blades[J]. Measurement Science and Technology,2011,22(8): 085403.1-085403.10. [23] 葛宁, 高丽敏, 姜衡, 等. 基于光电传感器的转子叶片表面动态压力光学测量方法: CN111076852B[P]. 2021-04-02. -
点击查看大图
计量
- 文章访问数: 515
- HTML浏览量: 218
- PDF量: 52
- 被引次数: 0