Measurement of turbulence velocity fluctuations in transonic wind tunnel using Interferometric Rayleigh Scattering diagnostic technique
-
摘要: 为了测量高速流场的湍流度，研究了基于法布里-珀罗（Fabry-Pérot）干涉仪的干涉瑞利散射测速技术。设计了干涉瑞利散射速度测量装置，主要由大功率窄线宽连续激光器、法布里-珀罗干涉仪和高帧频EMCCD相机组成，激光器提供连续光源照射流场形成气体分子瑞利散射，并通过法布里-珀罗干涉仪和EMCCD，实现了对流场气体分子瑞利散射光谱精细分辨，获得了高时间分辨速度测量结果。经过理论分析，该装置的速度分辨率为1.23m/s；通过与热线风速仪湍流度测量实验的结果进行对比，验证了干涉瑞利散射测速技术具备流场湍流度非接触测量能力；利用干涉瑞利散射测速装置，在0.3m×0.3m跨超声速风洞上，开展了Ma3.0条件下流场湍流度测量实验，获得了超声速流场的平均速度和湍流度测量结果，装置时间采样率达到4kHz。Abstract: The interferometric Rayleigh scattering diagnostic technique for the time-resolved velocity measurement of the transonic wind tunnel is studied. The velocity-measurement apparatus, consisted of a CW laser, a high resolution Fabry-Pérot interferometer and a high-speed EMCCD camera, is designed. Rayleigh scattering light is produced as the flow irradiated by the laser. Then the light is collected and analyzed accurately by the Fabry-Pérot interferometer and the camera. Theoretically, this systematic velocity-measurement accuracy can reach 1.23m/s. Measurement accuracy is then evaluated by comparing with hot wire anemometry results. Moreover, the distributions of velocity and turbulence intensity in a supersonic flow at Mach number 3.0 are obtained quantitatively. The sampling rate in this measurement reached about 4 kHz.
-
图 2 (a) 同一时刻不同级次(只标记出k，k-1)的参考激光(用黑色虚线标记)及瑞利散射信号(用黑色点线标记)形成的干涉圆环；(b)不同波长激光Fabry-Pérot干涉圆环一维强度分布计算结果，插图为局部放大结果
Figure 2. (a) Interference rings consist of the reference laser (black dotted lines) and the Rayleigh light (black solid lines) scattered simultaneously at different levels (k, k-1), (b) Computational 1D intensity distributions of Fabry-Pérot interference rings at different laser wavelengths. The inset shows a partially enlarged view
图 3 热线风速仪速度脉动(a)及功率谱(b)测量结果
Figure 3. The measured velocity pulsation (a) and the power spectrum (b) by the hot wire anemometry
图 4 干涉瑞利散射测速装置速度脉动(a)及功率谱(b)测量结果
Figure 4. The measured velocity pulsation (a) and the power spectrum (b) by the IRS speedometer
图 5 干涉瑞利散射测速装置在0.3m×0.3m跨超声速风洞上的实验布局
Figure 5. The measuring layout in 0.3m×0.3m transonic wind tunnel using the time-resolved IRS speedometer
-
[1] Mielke A F, Seasholtz R G, Elam K A. Time-average measurement of velocity, density, temperature, and turbulence velocity fluctuations using Rayleigh and Mie scattering[J]. Exp Fluids, 2005, 39(2):441-454. doi: 10.1007/s00348-005-0990-8 [2] Mielke A F, Elam K A. Multiproperty measurements at high sampling rates using Rayleigh scattering[J]. AIAA Journal, 2009, 47(4):850-862. doi: 10.2514/1.37369 [3] 朱博, 汤更生.声学风洞流场低湍流度及频谱测量研究[J].实验流体力学, 2015, 29(4):58-64. http://www.syltlx.com/CN/abstract/abstract10860.shtmlZhu B, Tang G S. Low turbulence intensity and spectrum measurement research in aeroacoustic wind tunnel[J]. Journal of Experiments in Fluid Mechanics, 2015, 29(4):58-64. http://www.syltlx.com/CN/abstract/abstract10860.shtml [4] Dorothea I, Hollnagel M, Paul E. Laser Doppler Velocimetry (LDV) and 3D Phase-Contrast Magnetic Resonance Angiography (PC-MRA) velocity measurements:Validation in an anatomically accurate cerebral artery aneurysm model with steady flow[J]. J Magn Reson Imaging, 2007, 26(6):1493-1505. doi: 10.1002/(ISSN)1522-2586 [5] Yeh Y, Cummins H Z. Localized fluid flow measurements with an He-Ne laser spectrometer[J]. Appl Phys Lett, 1964, 4(10):176-178. doi: 10.1063/1.1753925 [6] Kaffelabc A, Moureha J, Harionbc J L. TR-PIV measurements and POD analysis of the plane wall jet subjected to lateral perturbation[J]. Exp Fluids, 2016, 77(4):71-78. http://www.sciencedirect.com/science/article/pii/S0894177716300772 [7] Lock J A, Seasholtz R G, John W T. Rayleigh-brillouin scattering to determine one-dimensional temperature and number density profiles of a gas flow jet[J]. Appl Opt, 1992, 31(15):2839-2848. doi: 10.1364/AO.31.002839 [8] Seasholtz R G, Zupanc F J, Schneider S J. Spectrally resolved Rayleigh scattering diagnostic for hydrogen-oxygen rocket plume studies[J]. J Propulsion and Power, 1992, 8(5):935-942. doi: 10.2514/3.23575 [9] Seasholtz R G, Buggele A E, Reeder M F. Flow measurements based on Rayleigh scattering and Fabry-Perot interferometer[J]. Optics and Lasers in Engineering, 1997, 27(6):543-570. doi: 10.1016/S0143-8166(96)00063-2 [10] Seasholtz R G, Greer L C. Rayleigh scattering diagnostic for measurement of temperature and velocity in harsh environments[R]. AIAA-1998-0206, 1998. [11] Mielke A F, Elam K A. Dynamic measurement of temperature, velocity, and density in hot jets using Rayleigh scattering[J]. Exp Fluids, 2009, 47(4):667-673. doi: 10.1007/s00348-009-0708-4 [12] Seasholtz R G, Panda J, Elam K A. Rayleigh scattering diagnostic for dynamic measurement of velocity fluctuations in high speed jets[R]. AIAA-2001-0847, 2001. [13] Seasholtz R G, Panda J, Elam K A. Rayleigh scattering diagnostic for measurement of velocity and density fluctuation spectra[R]. AIAA-2002-0827, 2002. [14] Mielke A F, Elam K A. Rayleigh scattering diagnostic for measurement of temperature, velocity, and density fluctuation spectra[R]. AIAA-2006-837, 2006. [15] 陈力, 杨富荣, 苏铁, 等.基于法布里-珀罗干涉仪的瑞利散射测速技术研究[J].光子学报, 2015, 44(1):0112004-1-0112004-4. http://d.old.wanfangdata.com.cn/Periodical/gzxb201501032Chen L, Yang F R, Su T, et al. Interferometric Rayleigh scattering velocimetry using a Fabry-Perot interferometer[J]. Acta Photonic Sinica, 2015, 44(1):0112004-1-0112004-4. http://d.old.wanfangdata.com.cn/Periodical/gzxb201501032 [16] Mielke A F, Clem M M, Elam K A. Rayleigh scattering measurements using a tunable liquid crystal Fabry-Perot interferometer[R]. AIAA-2010-4350, 2010. http://www.researchgate.net/publication/268558358_Rayleigh_Scattering_Measurements_Using_a_Tunable_Liquid_Crystal_Fabry-Perot_Interferometer [17] Amy F F, Michelle M C, Kristie A E. Improvement in Rayleigh scattering measurement accuracy[R]. AIAA-2012-1060, 2012. doi: 10.2514/6.2012-1060 [18] 郭永康.光学[M].北京:高等教育出版社, 2005.Guo Y K. Optics[M]. Beijing:Higher Education Press, 2005. [19] 盛森芝.热线热膜流速计[M].北京:中国科学技术出版社, 2003.Sheng S Z. Hot wire/film anemometer[M]. Beijing:Science and technology of China press, 2003. -
下载:
点击查看大图
计量
- 文章访问数: 223
- HTML全文浏览量: 97
- PDF下载量: 17
- 被引次数: 0
