光谱维度湍流脉动火焰红外辐射特性研究  

Research on Infrared Radiation Characteristics of TurbulentPulsating Flame in Spectral Dimension

作　　者：李金录 白璐[1] 王彪 郭兴 吴家骥[2] LI Jinlu;BAI Lu;WANG Biao;GUO Xing;WU Jiaji(School of Physics,Xidian University,Xi’an 710071,Shaanxi,China;School of Electronic Engineering,Xidian University,Xi’an 710071,Shaanxi,China;National Key Laboratory of Scattering and Radiation,Shanghai 200438,China)

机构地区：[1]西安电子科技大学物理学院,陕西西安710071 [2]西安电子科技大学电子工程学院,陕西西安710071 [3]散射辐射全国重点实验室,上海200438

出　　处：《制导与引信》2024年第4期54-60,共7页Guidance & Fuze

基　　金：国家自然科学基金(U22B2045,U20B2059,61875156)。

摘　　要：为了研究湍流脉动对高温火焰红外光谱辐射特性的影响,采用大涡模拟(large eddy simulation,LES)方法计算了Sandia D部分预混(甲烷/空气)射流火焰瞬态流场标量场,并进行了相关实验验证;在此基础上,分别采用时均标量-光谱辐射法和瞬态标量-时均光谱辐射法计算了火焰的红外光谱辐射特性。结果表明:在光谱维度上,相较于考虑湍流-辐射交互作用(turbulent-radiation interaction,TRI)的瞬态标量-时均光谱辐射,时均标量-光谱辐射水平存在被低估现象,并且随着火焰湍流标量场波动的增大,低估程度加剧;火焰光谱的动态变化与湍流火焰流场存在强关联性,可用于诊断火焰流场的动态发展过程。In order to study the influence of turbulent pulsation on the infrared spectral radiation characteristics of high-temperature flames,the large eddy simulation(LES)method was used for simulating the transient flow field scalars of the Sandia D partially premixed(CH 4/air)jet flame.Relevant experimental verifications were carried out.On this basis,the time-averaged scalar-spectral radiation method and the transient scalar-time-averaged spectral radiation method were used for calculating the infrared spectral radiation of the flame.The results show that the time-averaged scalar-spectral radiation level is underestimated in the spectral dimension,compared with the transient scalar-time-averaged spectral radiation considering.The magnitude of the underestimate increases with the increase of the flame turbulence scalar field fluctuation.There is a strong correlation between the dynamic changes of flame spectrum and the turbulent flame flow field,which can be used for diagnosing the dynamic development process of flame flow field.

关 键 词：湍流脉动 红外光谱辐射 湍流-辐射交互作用 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]