硝酸乙基铵推进剂燃烧骨架机理的构建和验证  

Construction and Validation of Skeletal Combustion Mechanism for Ethylammonium Nitrate Propellant

作　　者：邓梓健 彭惠生 杨天杭 DENG Zijian;PENG Huisheng;YANG Tianhang(School of Aeronautics and Astronautics,Sun Yat-Sen University,Shenzhen 518107,China)

机构地区：[1]中山大学航空航天学院,深圳518107

出　　处：《南京航空航天大学学报》2024年第4期650-657,共8页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家重点研发计划(2020YFC2201101);广东省自然科学基金(2022A1515010149)。

摘　　要：为得到适用于硝酸乙基铵(Ethylammonium nitrate,EAN)推力器燃烧数值模拟的燃烧机理,以包含EAN蒸发产物硝酸和乙胺的详细化学反应机理为基础,构建了EAN详细燃烧机理,采用生产速率(Rate of production,ROP)分析以及敏感性分析相结合的方法对详细机理进行简化,得到了包含82组分291反应的EAN燃烧骨架机理。分别使用两种机理对乙胺着火延迟时间、层流预混火焰中组分分布以及在激波管内反应过程中组分分布,硝酸在激波管内反应过程中组分分布进行了数值模拟,通过比较实验数据和模拟结果,对详细机理和骨架机理进行验证。验证结果表明:骨架机理的模拟结果与实验数据以及详细机理的模拟结果一致,表明了EAN燃烧骨架机理的准确性。得到的骨架机理为EAN推力器燃烧数值模拟提供了反应机理模型。In order to obtain a mechanism which is suitable for numerical simulation of combustion process in EAN thruster,a detailed combustion mechanism for EAN is presented based on the existing mechanism containing EAN evaporation products nitric acid and ethylamine,and a skeletal mechanism for EAN combustion consisting 82 species and 291 reactions is obtained by simplifying the detailed mechanism through an integrated reduction method that contains rate of production(ROP)analysis and sensitivity analysis.The ignition delay time,species profiles in premixed laminar flames and shock tubes for ethylamine reaction and species profiles in shock tubes for nitric acid reaction are simulated by using detailed mechanism and skeletal mechanism.Validations for two mechanisms are presented by comparing their simulation results and experimental datas.The validations show that simulation results of skeletal mechanism are in agreement with experimental datas and predictions of detailed mechanism,which proves that the skeletal mechanism is credible.The obtained skeletal mechanism provides a reaction mechanism model for numerical simulation of combustion process in EAN thruster.

关 键 词：硝酸乙基铵 燃烧机理 骨架机理 生产速率分析 敏感性分析 

分 类 号：O643.12[理学—物理化学]