涡扇发动机加减速控制规律设计的功率提取法

为了简单、快速和准确地设计双轴涡扇发动机加、减速控制规律,提出了一种加、减速控制规律设计的新方法——功率提取法:在发动机稳态特性计算模型的基础上,分别从高、低压转子提取额外功率,使得高压压气机工作点(线)沿等换算转速线移动,并保证低压转子转速满足预定的要求,在同时考虑风扇和压气机喘振裕度限制、涡轮进口总温限制以及燃烧室熄火边界的条件下,利用适当的描述形式,可以快速而准确地获得最优双轴涡扇发动机加、减速控制规律.对某型涡扇发动机加速控制规律的改进设计结果表明,提出的加、减速控制规律的设计方法具有直观、快速、准确而有效的优点. 

Power extraction method for acceleration and deceleration control law design of turbofan engine

A new and effective method - power extraction method (PEM), which is a simple, rapid and accurate tool of turbofan engine for acceleration and deceleration control law design is proposed in this paper. Based on the steady-state performance computing model, virtual power extractions of fan shaft and compressor shaft were introduced to make the steady-state operating points (line) move from the normal operating points (line) at the constant corrected line of compressor, and the speeds of fan shaft and compressor shaft were maintained at given values. Taking surge margin limit of compressor and fan, total temperature limit of turbine inlet and the flameout limit of combustor into account, using appropriate form to describe the acceleration and deceleration control law, and combined with the experiences of research and the development of turbine engines, the acceleration and deceleration control law of turbofan was designed rapidly and accurately. The computing results of the improved acceleration control law of some turbofan engine indicate that the VPEM is accurate and effective.