考虑OTDF和氮氧化物排放特性的航空发动机部件级模型  

Aero-engine component level model considering OTDF and NOx emission characteristics

作　　者：胡晨旭 潘阳[2] 郑前钢 张海波 李建中 汪勇 HU Chenxu;PAN Yang;ZHENG Qiangang;ZHANG Haibo;LI Jianzhong;WANG Yong(Jiangsu Province Key Laboratory of Aerospace Power System,College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;The 28th Research Institute,China Electronics Technology Group Corporation,Nanjing 210007,China)

机构地区：[1]南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室,南京210016 [2]中国电子科技集团公司第二十八研究所,南京210007

出　　处：《航空动力学报》2023年第11期2766-2775,共10页Journal of Aerospace Power

基　　金：国家自然科学基金(51906102,52176009);国家科技重大专项(J2019-Ⅱ-0009-0053,J2019-Ⅰ-0020-0019,2019-Ⅲ-0014-0058);先进航空动力创新工作站项目(HKCX2022-01-026-03,HKCX2022-01-026-03,HKCX2020-02-027);南京航空航天大学前瞻布局科研专项资金(ILA220341A22,ILA220371A22);江苏省卓博计划(2022ZB202);研究生科研与实践创新计划(XCXJH20210216);中国博士后科学基金(2021M701692)。

摘　　要：建立了一种考虑出口温度分布系数(OTDF)和氮氧化物(NOx)排放特性的航空发动机部件级模型,为发动机燃烧室出口温度分布和排放控制研究提供了仿真平台。以某变循环发动机为研究对象,依据其设计点参数设计燃烧室三维模型,基于CFD数值仿真方法,得到该燃烧室三维模型在海平面不同工作状态下的OTDF特性、氮氧化物排放特性。基于此,建立了适用于全包线、全状态下,可计算燃烧室特性参数的变循环发动机部件级模型。与传统部件级模型相比,该模型能准确地计算发动机在不同工作状态、不同包线点下的燃烧室出口温度分布、氮氧化物排放。仿真结果表明:燃烧室出口温度分布系数与发动机工作状态呈负相关关系,发动机转速越大,OTDF越小,燃烧室出口温度分布品质越好;燃烧室出口氮氧化物排放量与发动机工作状态呈正相关关系,发动机转速越大,燃烧室出口氮氧化物排放量越多,符合发动机燃烧基本规律。An aero-engine component level model considering outlet temperature distribution factor(OTDF)and nitrogen oxides(NOx)emission characteristics was established,which provided a simulation platform for the study of engine combustor outlet temperature distribution and emission control.Taking a variable cycle engine as the research object,the three-dimensional combustor model was designed according to its design point parameters.Based on CFD numerical simulation method,the OTDF characteristics and NOx emission characteristics of the three-dimensional combustor model under different working conditions at sea level were obtained.Based on this,a component level model of variable cycle engine was established,which can calculate the characteristic parameters of combustor under full envelope and full state.Compared with the traditional component level model,the model can accurately calculate the combustor outlet temperature distribution and NOx emission under different working conditions and different envelope points.The simulation results showed that there was a negative correlation between the temperature distribution coefficient at the outlet of the combustor and the working state of the engine.The higher engine speed indicated,the smaller OTDF and the better temperature distribution quality at the outlet of the combustor.There was a positive correlation between the NOx emission at the outlet of the combustor and the working state of the engine.The higher engine speed indicated more NOx emission at the outlet of the combustor,which was in line with the basic law of engine combustion.

关 键 词：发动机部件级模型 出口温度分布 氮氧化物 全包线 燃烧室特性 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]