Simultaneous multi-point multi-parameter flow measurement using Interferometric Rayleigh scattering (IRS) at 100-kHz repetition rate is demonstrated. Using a burst-mode laser and an un-intensified high-speed camera, interferograms are obtained that contain spatial, temporal and scattered light frequency information. The method of analysis of these interferograms to obtain simultaneous multi-point flow velocity and temperature measurements is described. These methods are demonstrated in a 100-kHz-rate study of a choked, under-expanded jet flow discharged by a convergent nozzle. Measurement results and uncertainties are discussed. The 100-kHz IRS technique with un-intensified imaging is applicable in large-scale wind tunnels for the study of unsteady and turbulent flows.

中文翻译：

---

用于多参数流量测量的100 kHz干涉瑞利散射。

演示了使用干涉式瑞利散射（IRS）以100 kHz重复频率进行的同时多点多参数流量测量。使用突发模式激光和未增强的高速相机，可以获得包含空间，时间和散射光频率信息的干涉图。描述了分析这些干涉图以获得同时多点流速和温度测量值的方法。这些方法在对收敛喷嘴喷出的阻塞，膨胀不足的射流进行100 kHz速率的研究中得到了证明。讨论了测量结果和不确定性。具有非增强成像功能的100 kHz IRS技术适用于大型风洞，用于研究不稳定和湍流。