High-Enthalpy Flow Investigations by UV Laser-Induced Fluorescence

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	High-Enthalpy Flow Investigations by UV Laser-Induced Fluorescence
	Yang H(杨浩); Zhang SH(张少华); Wang FY(王芳仪); Yu XL(余西龙)
	2019
会议日期	June 17, 2019 - June 20, 2019
会议地点	Rome, Italy
页码	4242-4247
英文摘要	A dual-dye-laser Laser-induced Fluorescence (LIF) system is established for flow field investigations in JF-10, a H2/O2-detonation-driven shock tunnel. The shock tunnel generates 400 mm-wide hypersonic flow with total enthalpy of 16.1 MJ/kg and static pressure at only105Pa, where LIF measurement is extremely challenging. In this LIF system, the laser sheet of a conventional planar LIF is rotated 90 degrees along its propagation direction, so that the fluorescence signal collected by the camera concentrates on a sharp line. The S/N ratio is increased, thus single-shot measurements are achievable. The rotational temperature of the flow measured by two-line thermometry (TLT) with simultaneous excitation of two \gamma (0,0) transitions of NO at distinct rotational levels. Compared with single-dye-laser set-up, the current system is less affected by the fluctuation of the flow field from each facility operation, thus capable of reflect the dramatic temperature change across the shock layer. With precise control of the proper of the laser, and through evaluation of the error of the data, the temperature measurement and numerical simulation in the flow is consistent. Meanwhile, the velocity of the flow is measured by molecular tagging velocimetry (MTV) with a long-life fluorescence excitation, and the result agrees with the expected value. The UV LIF technique is proven useful in flow diagnostics in high-enthalpy regime. © 2019 IEEE.
会议录	Progress in Electromagnetics Research Symposium
语种	英语
URL标识	查看原文
ISBN号	9781728134031
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/85093]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.Institute of Mechanics, Chinese Academy of Sciences, China 2.School of Engineering Science, University of Chinese Academy of Sciences, China
推荐引用方式 GB/T 7714	Yang H,Zhang SH,Wang FY,et al. High-Enthalpy Flow Investigations by UV Laser-Induced Fluorescence[C]. 见:. Rome, Italy. June 17, 2019 - June 20, 2019.