混合排气涡扇发动机外内涵混合面积变化对整机性能的影响

The Influence of Mixing Area Changing of Bypass/ Core Flow on Turbofan Engine Performance

本文通过数值计算方法,研究了外内涵混合面积变化对混合排气涡扇发动机整机性能参数影响,总结了性能参数变化特点,对变化原因进行了分析。指出外内涵混合面积如按照特定规律在一定范围内同时变化,发动机整机匹配不发生变化。本文研究将有助于提高设计人员对发动机整机匹配的认识,对发动机性能分析及优化调试具有指导作用。

By using numerical simulation method, the influence of mixing area changing of bypass/core flow on mixed flow turbofan performance was researched. The features of parameter changing were summarized and the cause of changing was analyzed. Through all the work above, it was found that the performance of an engine didn＇t change if the mixing area of bypass flow and core flow varied simultaneously in a certain range according to a given rule. The research is helpful for an engine designer to improve the recognizing level of the match of an engine. It can also guide the analyzing and optimizing of the engine performance.