航空学报2025，Vol.46Issue(17)：30-44,15.DOI:10.7527/S1000-6893.2025.31549
基于改进SGS-TRI模型的湍流燃气射流红外辐射特性
Infrared radiation characteristics of turbulent gas jets based on improved SGS-TRI model
摘要
Abstract
To address the issue of low prediction accuracy of gas jet Sub-Grid Scale Turbulence-Radiation Interaction(SGS-TRI)properties with the existing modeling methods,a correlation fluctuation term that accounts for the interac-tion between radiation-participating components and temperature into the sublattice Snegirev relationship is introduced.Simultaneously,a new and more user-friendly model for complex projects is established.The algorithm solving the dy-namic sub-grid model coefficients facilitates the calculation of the dynamic Smagorinsky model and temperature vari-ance model coefficients.The validity of this algorithm is confirmed through Direct Numerical Simulations(DNS)of iso-tropic turbulence and high-temperature air jet flow characteristic test data.Furthermore,considering the detection dis-tance,the TRI properties and SGS-TRI properties of the 3-5 μm band infrared signal of the gas jet from an axisymmet-ric exhaust system are calculated and analyzed by utilizing the multi-scale multi-group wide-band k-distribution model.The properties of the multi-line group wide band model elucidate the formation mechanism of the observed phenomena.关键词
湍流脉动/燃气射流/亚格子模型/SGS-TRI/红外辐射Key words
turbulent fluctuation/gas jet/sub-grid model/SGS-TRI/infrared radiation分类
航空航天引用本文复制引用
郝健辛,王强,胡海洋..基于改进SGS-TRI模型的湍流燃气射流红外辐射特性[J].航空学报,2025,46(17):30-44,15.基金项目
国家科技重大专项(J2019-Ⅲ-0009-0053) National Science and Technology Major Project of China(J2019-Ⅲ-0009-0053) （J2019-Ⅲ-0009-0053）
