电弧风洞NO平面激光诱导荧光可视化方法与试验验证

doi:10.7527/S1000-6893.2023.28391

Abstract

Abstract:

Planar Laser-Induced Fluorescence （PLIF） visualization of high enthalpy flow， which is developed in recent years， is an efficient method for diagnosing the flow field in the arc-heated wind tunnel. However， due to the hostile measurement environment in the high-power arc-heated wind tunnel， it is difficult to carry out the related research. To address the difficulties of high enthalpy flow measurement in the arc-heated wind tunnel with low density and wide temperature range excitation， long distance detection and strong background radiation， we chose Nitric Oxide （NO） as the tracer particle， selected the excitation wavelength suitable for a wide temperature range through optimization， and designed a laser sheet shaping system with variable attack angles and heights according to the requirements of the test model. Moreover， a large flux and high gain detection system is utilized to carry out NO-PLIF visualization experiments in the high-power arc-heated wind tunnel. We obtained the NO-PLIF images of free-flow， and the NO-PLIF images of shock layers in flat plate models with different attack angles and wall surface heights， which provides basic data support for thermal protection research of aircraft.

Key words: high enthalpy flow, arc-heated wind tunnel, Planar Laser-Induced Fluorescence (PLIF), Nitric Oxide (NO), thermal protection of aircraft

CLC Number:

V211.71

Xun YUAN, Xin YU, Jiangbo PENG, Hui ZENG, Dongbin OU. Research and experimental verification of NO-PLIF visualization method in arc-heated wind tunnel[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(19): 128391-128391.

Figures/Tables 10

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Research and experimental verification of NO-PLIF visualization method in arc-heated wind tunnel

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