基于试飞数据的民用发动机部件特性修正方法  

作　　者：周超 李密[1] 

机构地区：[1]中国飞行试验研究院发动机所,西安710089

出　　处：《科技创新与应用》2024年第5期52-56,共5页Technology Innovation and Application

摘　　要：由于民用航空发动机外涵尾喷管容易不临界,不同马赫数下发动机工作线不同,仅利用地面台架试验数据修正发动机部件特性,整机模型精度较差。因此,该文利用发动机试飞数据,提出一种改进的部件特性删除法,将发动机非设计点计算转化为设计点计算,减少目标方程数量,简化算法,同时考虑对不同转速和不同马赫数下部件特性修正,以此建立整个飞行包线内发动机整机数学模型,计算结果与试飞数据进行对比,发动机整机模型在整个飞行包线内各参数误差均小于3%,发动机推力误差更是小于1%。Due to the fact that the nozzle is easy to be non-critical,and the working line of the engine is different under different Mach numbers,the accuracy of the whole engine model is poor only by using the ground test data to modify the characteristics of the engine components.So this paper based on the data of engine flight test,an improved method of deleting the characteristics of components is proposed,which transforms the engine non-design point calculation into the design point calculation.The number of target equations is reduced and the algorithm is simplified.As well the modification of component characteristics at different speeds and Mach numbers is considered.Based on this the mathematical model of the whole engine in the whole flight envelope is established.Compared with the flight test data,the error of all parameters in the whole flight envelope is less than 3%,and thrust error is less than 1%.

关 键 词：航空发动机 发动机模型 部件特性 修正因子 部件特性删除法 

分 类 号：V235.13[航空宇航科学与技术—航空宇航推进理论与工程]