在涡扇发动机起动过程中, 优化燃烧室点火供油规律是保证起动成功的一项关键技术。依据燃烧室部件特性, 并考虑发动机控制系统供油精度, 研究了渐进式起动点火供油规律的设计方法。该设计方法主要包括初始点火油量、点火油量上升斜率和最大点火油量限制条件等内容, 在此基础上提出了点火成功的判断条件, 应用于某型发动机地面台架试验、高空台模拟试验和装机试飞验证。试验结果表明, 该方法实用、有效, 发动机地面和空中起动过程点火迅速可靠, 未出现异常现象。
During the starting process of turbofan engine, the optimization of fuel supply in main combustor is an important key technology of successful start.According to the components characteristics of main combustor, and considering the accuracy of the engine control system, this paper puts forward a design method of asymptotic ignition for fuel supply control law.The method mainly includes the basic fuel quantity, the rate of rise and maximum of ignition fuel supply.Based on this, the judgment conditions of successful ignition are presented.It is applied to a certain type of turbofan engine.With the analysis of ground test, simulated altitude test and test flight, the method is proved to be more practical and effective.
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