结合QAR的热力学模型在单元体分析中的应用  

Application of Thermodynamic Model Combined with QAR in Analysis of Engine Unit

作　　者：曹惠玲[1] 李家兴[1] 

机构地区：[1]中国民航大学航空工程学院,天津300300

出　　处：《机械工程与自动化》2016年第6期42-44,共3页Mechanical Engineering & Automation

基　　金：民航大学博士启动基金资助项目(QD02S04)

摘　　要：航空发动机单元体评估方法大都是对各单元体的气路参数进行分析,而航空公司往往采用效率这一综合反映单元体性能的参数对单元体进行分析。因此应用热力学原理对发动机各单元体建立热力学模型,并结合实际QAR数据中记录的各站位气动参数来计算各单元体效率。通过计算同一发动机各单元体在不同航班巡航时的效率,分析了效率随使用时间的变化趋势。结果显示,随着使用时间的增加,各单元体效率都在减小,说明了该方法的有效性。The evaluation methods of aero-engine unit are mostly based on the analysis of gas path parameters.But the airlines tend to use the efficiency which can comprehensively reflect the performance of unit to analyze the performance of unit.The thermodynamic model of an engine unit was established by applying thermodynamic principle,which was combined with the aerodynamic parameters of each station recorded in actual QAR data,to calculate the efficiency of the unit.By calculating the efficiency of each unit of the same engine in different flight,it analyzed the changes in efficiency over the time.The results show that the efficiency of each unit decreases with the increase of the flight time,which can be used to demonstrate the effectiveness of this method.

关 键 词：单元体效率 热力学模型 QAR 气动参数 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]