Abstract: To simulate turbofan engine performances under transient conditions ,a method of computation was presented The volume effects of mixer afterburner,combustor and outlet duct was considered Performances of fan,compressor,turbine and times for fueling afterburner fuel ducts were incorporated into simulation Based on dynamical equations in three volumes the simulation could be fast performed with high fidelity and without iteration Based on this model,the engine performances under transient conditions were calculated

Key words: Turbofan engine;Transient rating;Transient parameter;Numerical calculation

摘要： 考虑混合室加力燃烧室、主燃烧室和外涵道的容积效应 ,风扇、压气机、高压和低压涡轮等部件的特性 ,加力燃烧室供油管的充油时间等因素 ,提出了模拟低涵道比混合排气加力涡轮风扇发动机过渡过程的计算方法。以混合室加力燃烧室、主燃烧室和外涵道 3个容积室的动态方程为基础 ,详细分析计算了某发动机过渡态的性能 ,用很小的时间步长逐渐逼近 ,计算不需要迭代 ,速度快 ,精度满足工程要求

关键词: 涡轮风扇发动机;过渡工作状态;瞬态参数;数值计算