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军用航空发动机的设计思想已出现三次跳越式的转变:一是从重视性能到重视适用性、可靠性、维修性、测试性、保障性(五性)的转变;二是从重视采购费用到寿命周期费用的转变;三是从重视效能或寿命周期费用到二者的统一,即重视经济可承受性的转变。经济可承受性已成为现代军用航空发动机设计体系中不可缺少的重要组成部分,是各种新型号研制发展初期就必须考虑的重要指标。
Military aeronautic engine design ideas have emerged three jump-style changes: First, focus on performance to attach importance to the applicability, reliability, maintainability, testability, protection (five sexes) change; Second, from the emphasis on procurement costs to Life cycle costs change; Third, from the emphasis on performance or life cycle costs to the unity of the two, that is, pay attention to changes in economic affordability. Economic affordability has become an indispensable and important part in the design system of modern military aircraft engines. It is an important index that must be considered in the early stage of development of new models.