基于吸收光谱技术的气流速度测量研究
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摘要
气体运动速度的非接触在线测量在发动机等高速流场实验研究中具有重要意义。基于吸收光谱技术中吸收谱线的多普勒频移效应,设计并搭建了高速气流测速系统,对经过拉瓦尔喷管加速的高速气流速度进行了实时在线检测。实验选用H_2O在1392 nm附近的特征吸收谱线,基于LabVIEW程序进行数据采集与处理得到实时流速。在此基础上,分析了该系统的速度测量极限,为后续系统进一步优化及整体装置的开发奠定了基础。
Non-contact on-line measurement of gas velocity is of great significance in the experimental study of high-speed flow field such as engines.Based on the Doppler frequency shift effect of absorption line in gas absorption spectrum technology,a high-speed airflow velocity measurement system is designed and constructed,and the speed of airflow accelerated by Laval nozzle is measured online in real time.In the experiment,the characteristic absorption line of H_2O near 1392 nm is selected,and data acquisition and processing are conducted based on LabVIEW to obtain real-time velocity.On this basis,the speed measurement limit of the system is analyzed,which lays a foundation for further optimization of the follow-up system and development of the overall device.
Non-contact on-line measurement of gas velocity is of great significance in the experimental study of high-speed flow field such as engines.Based on the Doppler frequency shift effect of absorption line in gas absorption spectrum technology,a high-speed airflow velocity measurement system is designed and constructed,and the speed of airflow accelerated by Laval nozzle is measured online in real time.In the experiment,the characteristic absorption line of H_2O near 1392 nm is selected,and data acquisition and processing are conducted based on LabVIEW to obtain real-time velocity.On this basis,the speed measurement limit of the system is analyzed,which lays a foundation for further optimization of the follow-up system and development of the overall device.
引文
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[15] JIA Liangquan,LIU Wenqing,KAN Ruifeng,et al.Oxygen mass flow detection method in supersonic flow based on TDLAS[J].Acta Photonica Sinica,2015,44(7):67-72.(in Chinese)贾良权,刘文清,阚瑞峰,等.采用TDLAS的超音速气流中氧气质量流量检测法[J].光子学报,2015,44(7):67-72.
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[17] HUANG Bin.Experimental investigations on outlet combustion flow field of RBCC engine by usingTDLAS technique[D].Xi′an:Northwestern Polytechnical University,2015.(in Chinese)黄斌.基于TDLAS的RBCC发动机出口燃烧流场诊断实验研究[D].西安:西北工业大学,2015.
[2] LI Jun,Su Ming.Experiment on turbine blade unsteady flow with PIV[J].Huazhong Univ.of Sci.& Tech(Nature Science Edition),2007(S1):133-135.(in Chinese)李军,苏明.涡轮叶栅非定常流动的PIV实验[J].华中科技大学学报:自然科学版,2007(S1):133-135.
[3] YE Jingfeng,Li Guohua,Hu Zhiyun,et al.The hydroxyl tagging velocimetry for boundary layer velocity measurements in high speed flow[C]// National Shock Wave and Shock Tube Academic Conference.2012.(in Chinese)叶景峰,李国华,胡志云,等.用于高速流场附面层速度测量的HTV技术[C]// 全国激波与激波管学术会议.2012.
[4] CHEN Aiguo,CHEN Li,LI Zhihui,et al.Research on application of Rayleigh scattering velocity measurement in hypersonic low density wind tunnel[J].Journal of Experiments in Fluid Mechanics,2017,31(06):51-55.(in Chinese)陈爱国,陈力,李志辉,等.瑞利散射测速技术在高超声速流场中应用研究[J].实验流体力学,2017,31(06):51-55.
[5] YANG Bin,QI Zongman,YANG Huinan,et al.Velocity measurement method based on TDLAS for combustion flow[J].Journal of Combustion Science and Technology,2015(6):516-520.(in Chinese)杨斌,齐宗满,杨荟楠,等.基于TDLAS的燃烧流场速度测量方法[J].燃烧科学与技术,2015(6):516-520.
[6] Philippe L C,Hanson R K.Laser diode wavelength-modulation spectroscopy for simultaneous measurement of temperature,pressure,and velocity in shock-heated oxygen flows[J].Applied Optics,1993,32(30):6090.
[7] Lyle K H,Jeffries J B,Hanson R K.Diode-Laser Sensor for Air-Mass Flux 1:Design and Wind-Tunnel Validation[J].AIAA Journal,2007,45(9):2204-2212.
[8] Lyle K H,Jeffries J B,Hanson R K,et al.Diode-Laser Sensor for Air-Mass Flux 2:Nonuniform Flow Modeling and Aeroengine Tests[J].AIAA Journal,2007,45(9):2213-2223.
[9] We he S,Baer D,Hanson R,et al.Measurements of gas temperature and velocity in hypervelocity flows using diode-laser sensors[J].AIAA Journal,2008.
[10] Chang L S,Strand C L,Jeffries J B,et al.Supersonic Mass-Flux Measurements via Tunable Diode Laser Absorption and Nonuniform Flow Modeling[J].AIAA Journal,2011,49(49):2783-2791.
[11] YANG Bin,HE Guoqiang,LIU Peijin,et al.TDLAS-based measurements of parameters for incoming flow hot-firing test of air-breathing rocket engine[J].Chinese Journal of Lasers,2011,38(5):219-224.(in Chinese)杨斌,何国强,刘佩进,等.利用TDLAS技术开展吸气式发动机来流热试实验参数测量[J].中国激光,2011,38(5):219-224.
[12] GU Junqing,XU Shengli.Fluid velocity measurement of supersonic wind tunnel with tunable diode laser absorption spectroscopy[J].Laser & Infrared,2014,44(1):8-11.(in Chinese)谷俊青,徐胜利.可调谐二极管激光吸收光谱技术测量风洞流速[J].激光与红外,2014,44(1):8-11.
[13] SONG Junling,HONG Yanji,WANG Guangyu,et al.Measurement of supersonic flow parameters using laser absorption spectroscopy[J].Infrared and Laser Engineering,2014,43(11):3510-3515.(in Chinese)宋俊玲,洪延姬,王广宇,等.基于激光吸收光谱技术的超声速气流参数测量[J].红外与激光工程,2014,43(11):3510-3515.
[14] JIA Liangquan,LIU Wenqing,KAN Ruifeng,et al.Study on oxygen velocity measurement in wind tunnel by wavelength modulation-TDLAS technology[J].Chinese Journal of Lasers,2015,42(7):304-311.(in Chinese)贾良权,刘文清,阚瑞峰,等.波长调制-TDLAS技术测量风洞中氧气流速方法研究[J].中国激光,2015,42(7):304-311.
[15] JIA Liangquan,LIU Wenqing,KAN Ruifeng,et al.Oxygen mass flow detection method in supersonic flow based on TDLAS[J].Acta Photonica Sinica,2015,44(7):67-72.(in Chinese)贾良权,刘文清,阚瑞峰,等.采用TDLAS的超音速气流中氧气质量流量检测法[J].光子学报,2015,44(7):67-72.
[16] QU Dongsheng,HONG Yanji,WANG Guangyu,et al.Study on mass flux measurement methods of gas based on scanning wavelength modulation spectroscopy[J].Chinese Journal of Lasers,2016(9):145-154.(in Chinese)屈东胜,洪延姬,王广宇,等.基于扫描波长调制光谱的气体质量流量测量方法研究[J].中国激光,2016(9):145-154.
[17] HUANG Bin.Experimental investigations on outlet combustion flow field of RBCC engine by usingTDLAS technique[D].Xi′an:Northwestern Polytechnical University,2015.(in Chinese)黄斌.基于TDLAS的RBCC发动机出口燃烧流场诊断实验研究[D].西安:西北工业大学,2015.