Burst-mode velocimetry of hypersonic flow by nitric oxide ionization induced flow tagging and imaging

被引：8

作者：

Leonov, Boris S. ^{[1
]}

Moran, Ashley N. ^{[2
]}

North, Simon W. ^{[2
]}

Miles, Richard B. ^{[3
,4
]}

机构：

[1] Texas A&M Univ, Bush Combat Dev Complex, Bryan, TX 77807 USA

[2] Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA

[3] Texas A&M Univ, Dept Aerosp Engn, College Stn, TX 77843 USA

[4] Princeton Univ, Mech & Aerosp Engn, Princeton, NJ 08544 USA

来源：

OPTICS LETTERS | 2024年 / 49卷 / 03期

关键词：

FLEET VELOCIMETRY; LASER; FLUORESCENCE;

D O I：

10.1364/OL.503786

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This Letter describes, to the best of our knowledge, a new approach to flow tagging, nitric oxide (NO) Ionization Induced Flow Tagging and Imaging (NiiFTI), and presents the first experimental demonstration for singleshot velocimetry in a near Mach 6 hypersonic flow at 250 kHz. The mean velocity of 860 m/s was measured with a single -shot standard deviation of as low as 3.4 m/s and mean velocity uncertainty of 5.5 m/s. NiiFTI is characterized by a long fluorescence lifetime of nitrogen with 1e decay of approximately 50 mu s measured in air. The method relies on a single nanosecond laser combined with a high-speed camera, creating an opportunity for the utilization of a typical nitric oxide (NO) laser -induced fluorescence (LIF) experimental setup with minor modifications as well as pulse -burst lasers (PBLs) for ultrahigh repetition rates. (c) 2024 Optica Publishing Group

引用

页码：426 / 429

页数：4

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