摘要
高焓气流平面激光诱导荧光(PLIF)可视化是近年来发展起来的一种高效的电弧风洞流场诊断方法,但由于大功率电弧风洞测量环境较为恶劣,相关研究工作开展难度大。面向解决低密度宽温度范围激发、远距离探测和背景辐射强等电弧风洞高焓流场测量难题,以NO作为示踪粒子,优化选择了适合宽温度范围的激发波长,设计了根据试验模型需求可变攻角与高度的片光整形系统,并采用大通量、高增益探测系统,在大功率电弧风洞上开展了NO-PLIF可视化试验,获得了自由流和平板模型边界层不同攻角、不同壁面高度的NO-PLIF图像,为飞行器热防护研究提供基础数据支撑。
Planar Laser-lnduced 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 dificulties 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.
作者
袁勋
于欣
彭江波
曾徽
欧东斌
YUAN Xun;YU Xin;PENG Jiangbo;ZENG Hui;OU Dongbin(National Key Laboratory of Science and Technology on Tunable Laser,Harbin Institute of Technology,Harbin 150001,China;Institute of Opto-Electronic,Harbin Institute of Technology,Harbin 150001,China;BejingKey Laboratory of Arc Plasma Application Equipment,China Academyof AerospaceAerodynamics,Beijing 100083,China)
出处
《航空学报》
EI
CAS
CSCD
北大核心
2023年第19期68-77,共10页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(62175053)
黑龙江省自然科学基金(LH2021F028)
哈尔滨工业大学科研创新基金(HIT.NSRIF202245)。
