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介绍了小型涡扇发动机全状态实时数值仿真的建模方法。发动机采用基于特性的部件级模型,考虑了燃烧室、内涵喷管、外涵通道、高-低压涡轮过渡通道和风扇-压气机过渡通道的容积效应。燃油控制装置模型按照传感器、控制器、调节器等模块原理建立,考虑了大于0.01 s时间常数的惯性环节影响。该仿真程序为全状态、大偏离、动/稳态、具备实时能力的数值仿真模型,通过时间步长的数值积分完成,无需迭代、速度快,能够满足工程要求。本模型以动力装置各主要部件的试验特性为基础进行解算,保证了仿真结果的精确性。
The modeling method of full-scale real-time numerical simulation of small turbofan engine is introduced. The engine uses a feature-based component-level model that takes into account the volumetric effects of the combustion chamber, conformal nozzle, external culvert, high-low pressure turbine transition passage and fan-compressor transition passage. The fuel control device model is established according to the principle of sensors, controllers, regulators and other modules, taking into account the influence of the inertia of time constants greater than 0.01 s. The simulation program is a full-state, large deviation, dynamic / steady state, with real-time capability numerical simulation model, completed by numerical integration of time steps, without iteration, speed, to meet the engineering requirements. The model is solved on the basis of the experimental characteristics of the main components of the power plant to ensure the accuracy of the simulation results.