复燃反应速率对尾焰红外辐射不确定度量化分析  

Uncertainty quantification analysis of afterburning reaction rates on infrared radiation signatures of rocket exhaust plume

作　　者：马杰 王晓冰 牛青林 董士奎[3] MA Jie;WANG Xiaobing;NIU Qinglin;DONG Shikui(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China;National Key Laboratory of Scattering and Radiation,Shanghai 200438,China;Key Laboratory of Aerospace Thermophysics of MIIT,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]中北大学机电工程学院,山西太原030051 [2]散射辐射全国重点实验室,上海200438 [3]哈尔滨工业大学工信部空天热物理重点实验室,黑龙江哈尔滨150001

出　　处：《红外与激光工程》2024年第10期92-106,共15页Infrared and Laser Engineering

基　　金：国家自然科学基金项目(52006203,U22B2045);山西省回国留学人员科研资助项目(2021-113);山西省基础研究计划面上项目(202403021211078)。

摘　　要：高保真复燃化学反应模型是准确预估火箭发动机尾焰红外辐射特性的关键,其中复燃化学反应模型参数的偏差,会影响尾焰红外辐射特性模拟结果的可信度。因此,对复燃化学反应模型参数展开了不确定度量化分析,定量评估了化学反应速率的不确定性对流场参数及红外辐射特性数值模拟的影响。以复燃化学反应速率为不确定性变量,尾焰反应流场和红外辐射为系统响应值,基于非嵌入多项式混沌方法,采用随机响应面法求解多项式系数,结合Sobol指数算法量化由化学反应模型参数不确定性引起的红外辐射信号的不确定度。结果表明,化学反应速率对流场温度的影响较小,均体现在复燃高温区域,不确定度约为7.63%;燃气组分H2O的摩尔分数的不确定度相较CO_(2)高出8.2%,且对低含量区域的不确定度较大;红外辐射强度的不确定度在(2.7±0.3)μm波段较高,约为20.4%,较(4.3±0.3)μm波段高出7.8%;化学反应速率对红外辐射强度的灵敏程度均表现为三个链式反应为主要贡献。基于反应速率试验数据重构关键链式反应的化学反应动力学速率模型,该研究可为准确预测火箭发动机尾焰的红外辐射特性提供支撑。Objective Afterburning of rocket exhaust plumes releases a large amount of heat,which significantly raise the temperature level and infrared radiation intensity of the plume and reduce the stealth capability of the vehicle.Therefore,it is very important to accurately predict the afterburning process of the rocket exhaust plume for finely describing the multi-component reaction flows and to improve the calculation accuracy of the infrared radiation of the exhaust plume.The high-fidelity chemical reaction kinetic model is often used to describe the chemical nonequilibrium afterburning reaction of high-speed flow field.Due to the uncertainty of the parameters of the afterburning chemical model,the reliability of the simulation results of the infrared radiation signature of the plume will be affected.This article will quantitatively study the uncertainty of the reburning reaction rate to evaluate its impact on the exhaust plume flow field parameters and infrared radiation characteristics.Based on this,the key reactions that affect the uncertainty of infrared radiation are extracted and reconstructed.This study can provide theoretical support for accurately predicting the infrared radiation characteristics of the exhaust plume.Methods The finite rate chemical reaction model expressed by Arrhenius equation was adopted,and it was a H2/CO/HCl system with the 12-species 17-reaction chemical reaction kinetic model.The Latin hypercube sampling(LHS)method was employed to design the sampling of uncertain input parameters.The physical property parameters of the exhaust plume radiation were calculated using the statistical narrow-band(SNB)model.The radiative transport equation was solved employing the light-of-sight(LOS)method.Additionally,uncertainty analysis of the reacting flows and infrared radiation of rocket exhaust plumes were conducted using the No-polynomial Chaos Expansions(NIPC)method and the Sobol index algorithm.Results and Discussions The maximum uncertainty of the chemical reaction rates on the temperature of the

关 键 词：红外辐射 尾焰 复燃效应 化学反应 不确定度 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]