| 基于激光吸收光谱技术的超声速气流参数测量 |
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| 引用本文： | 宋俊玲,洪延姬,王广宇,潘虎.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. |
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| 作者姓名： | 宋俊玲 洪延姬 王广宇 潘虎 |
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| 作者单位： | 1.装备学院 激光推进及其应用国家重点实验室,北京 101416; |
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| 摘 要： | 采用可调谐半导体激光吸收光谱(TDLAS)技术,针对超声速直连台隔离段内超声速气流温度、组分浓度、速度和质量流量进行了测量.选择H2O的两条吸收谱线7 185.597 cm-1和7 454.445 cm-1,采用直接吸收-分时扫描方式,测量流场静温为899 K,并结合吸收面积得到H2O的组分浓度20.7%.根据安装在流场上游和下游成60的两条光路,测量流场速度为1 205 m/s,结合壁面压力传感器,测量流场的质量流量为1 500.49 g/s,较真实值偏差为5.23%.TDLAS测量系统实现了对超声速气流多参数快速线测量.
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| 关 键 词： | 可调谐半导体激光吸收光谱 超声速气流 温度测量 浓度测量 速度测量 |
| 收稿时间： | 2014-03-10 |
Measurement of supersonic flow parameters using laser absorption spectroscopy |
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| Song Junling,Hong Yanji,Wang Guangyu,Pan Hu.Measurement of supersonic flow parameters using laser absorption spectroscopy[J].Infrared and Laser Engineering,2014,43(11):3510-3515. |
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| Authors: | Song Junling Hong Yanji Wang Guangyu Pan Hu |
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| Affiliation: | 1.State Key Laboratory of Laser Propulsion & Application,Academy of Equipment,Beijing 101416,China;2.Science and Technology on Scramjet Laboratory,Hypervelocity Aerodynamics Institute of CARDC,Mianyang 621000,China |
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| Abstract: | Based on the tunable diode laser absorption spectroscopy(TDLAS) technique, temperature, concentration, velocity and mass flux of the supersonic flows were measured in isolator of a direct-connected scramjet. Two H2O absorption transitions 7 185.597 cm-1 and 7 454.445 cm-1 were adopted by using direct-absorption and Time Division Multiplexing strategy. The measurement results show the static temperature is of 899 K and the H2O concentration is of 20.7% calculating from the absorption area. A cross-beam configuration with angles of 60 along the flows was used to measure the axial velocity. Combined with the pressure sensor on the wall and the measured velocity of 1 205 m/s, the mass flux of the flow is of 1 500.49 g/s with deviation of 5.23%. The TDLAS measured system can be used for in-situ measurements of multiple parameters of supersonic flows. |
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| Keywords: | tunable diode laser absorption spectroscopy supersonic flows temperature measurement concentration measurement velocity measurement |
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