RP-3航空煤油简化机理在航空发动机燃烧室中的适用性评估  

Applicability assessment of reduced mechanism of RP-3 kerosene for combustion chamber in aero-engine

作　　者：郑玮琳 王娇 王麒骄 曾文 ZHENG Weilin;WANG Jiao;WANG Qijiao;ZENG Wen(School of Aero-Engine,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学航空发动机学院,辽宁沈阳110136

出　　处：《推进技术》2025年第2期175-186,共12页Journal of Propulsion Technology

基　　金：辽宁省教育厅面上项目(LJKMZ20220537);辽宁省属本科高校基本科研业务费专项资金。

摘　　要：为获得适合工程应用的RP-3航空煤油简化机理以及数值计算方法,针对某航空发动机燃烧室模型进行相同工况下的试验与数值仿真,耦合五种不同替代燃料组分以及反应数数量级的RP-3航空煤油简化反应机理获得的计算结果与试验数据对比分析,比较燃烧室内及燃烧室出口温度场、组分浓度场以及CO,NO_(x)等污染物的排放分布,分析不同化学反应机理的预测结果之间差异产生的原因。结果表明:五种简化反应机理均可以较好地反映出温度场以及组分浓度场的整体分布,但在具体数值的预测方面有所差异;其中,五组分简化机理对出口平均温度以及CO排放的预测最为准确,出口平均温度误差为0.41%,CO排放的误差为36.69%;四组分简化机理对NO_(x)排放的预测最为准确,NO_(x)排放的误差为0.63%,出口温度分布与试验数据吻合最好,整体来看具有更好的工程应用价值;单组分简化机理的整体计算结果准确性最低;此外,替代燃料组分以及反应数数量级的差异并未对基于火焰面生成流形建表的计算效率产生较大影响。In order to obtain the reduced mechanism and numerical computational method of RP-3 kero⁃sene suitable for engineering applications,experiment and numerical simulation were conducted based on a com⁃bustion chamber in aero-engine under the same working condition.The numerical results obtained by five differ⁃ent substitute fuels components and reduced mechanisms of different magnitude of reaction numbers were com⁃pared with experimental data.The temperature distribution,component concentration,and emission pollution such as CO and NO_(x) inside and at the outlet of the combustion chamber were compared in detail.Reasons for the differences in numerical results were also analyzed.The results show that all five reduced mechanisms can well re⁃flect the overall distribution of temperature and component concentration,but there exists differences in specific predicted values.The five components reduced mechanism is the most accurate in predicting average temperature and CO emission at the outlet of the combustion chamber,with the error of temperature is 0.37%and the error of CO emission is 36.69%.While the four component reduced mechanism is the most accurate in predicting NO_(x) emission,with the error of NO_(x) emission is 0.63%,and the outlet temperature distribution is in the best agree⁃ment with the experimental data,which has better engineering application value on the whole.The accuracy of the overall prediction results of the single component reduced mechanism is the worst.In addition,differences in the composition of substitute fuels and the magnitude of reaction numbers do not have a significant impact on com⁃putational efficiency based on the Flamelet Generated Manifold method.

关 键 词：RP-3航空煤油 简化机理 污染物排放 燃烧特性 计算效率 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]