Multi-beam interferometric Rayleigh scattering technique for simultaneous 2-D quantitative measurement of multi-parameters in high speed flow field
Multi-beam interferometric Rayleigh scattering technique for simultaneous 2-D quantitative measurement of multi-parameters in high speed flow field
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DOI：
10.1016/j.optcom.2021.127069
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发表时间：
2021-04
影响因子：
2.4
通讯作者：
Sheng Wang;J. Si;Zhi-yun Hu;Guohua Li;Zhenrong Zhang;Fang Bolang;Jingfeng Ye;Jun Shao
中科院分区：
文献类型：
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作者：
Sheng Wang;J. Si;Zhi-yun Hu;Guohua Li;Zhenrong Zhang;Fang Bolang;Jingfeng Ye;Jun Shao
为了诊断高速可压缩湍流流场，提出了一种基于多光束干涉瑞利散射（IRS）技术的二维多参数测量方法。在标准具分束作用下，多束激光探针与流场气体分子相互作用产生的瑞利散射信号形成二维干涉测量点阵。每个测量点都包含了特定空间位置对应的流场的热力学和速度信息。通过标定标准具在不同入射角下的有效精细度和透过率，提高了高阶干涉点温度和密度的测量精度。将多光束激光探针、放大成像系统和固体石英标准具相结合，建立了二维IRS测量系统。高速射流被用来验证该技术。得到了沿着喷嘴径向和轴向不同位置的温度、密度和速度分布。结果表明，该技术可以同时测量流场的二维多参数信息。
In order to diagnose the high-speed compressible turbulent flow field, a two-dimensional (2-D) multi-parameters measurement method based on multi-beam interferometric Rayleigh scattering (IRS) technique was proposed. Under the beam splitting of etalon, the Rayleigh scattering signals generated by the interaction between multi-beam laser probes and the flow field gas molecules formed 2-D interference measurement lattice. Each measurement point contained the thermodynamic and velocity information of the flow field corresponding to a specific spatial location. By calibrating the effective finesse and transmittance of the etalon at different incident angles, the measurement accuracy of temperature and density of high-order interferometric points was improved. A 2-D IRS measurement system was established by combining multi-beam laser probes, amplification imaging system and solid quartz etalon. A high speed jet was used to verify the technology. The distributions of temperature, density and velocity at different positions along the radial direction and axial direction of the nozzle were obtained. The results shown that the technique could be used to simultaneously measure the 2-D multi-parameter information of the flow field.