CAJ | 학술논문

为满足现代大型运输机增升系统高效、稳定的设计需求，以某型运输机增升构型为研究对象，通过数值模拟方法研究了动力因素对全机气动特性的影响。数值模拟结果表明：在动力因素影响下，全机最大升力系数增加46．2％，失速迎角增加11°；全机静安定度降低30．89％。通过流场机理分析可知：动力因素不仅对短舱后方襟翼当地流场有较大改善，而且对短舱和主翼上表面流场以及平尾当地迎角也有显著影响。基于以上结论，在运输机增升构型设计过程中，要充分考虑动力因素对各个部件当地流场的影响以提高升力特性；同时要权衡动力因素使机翼低头力矩增加、平尾低头力矩降低这两种趋势相反的影响结果以改善俯仰力矩特性。
위만족현대대형운수궤증승계통고효、은정적설계수구，이모형운수궤증승구형위연구대상，통과수치모의방법연구료동력인소대전궤기동특성적영향。수치모의결과표명：재동력인소영향하，전궤최대승력계수증가46．2％，실속영각증가11°；전궤정안정도강저30．89％。통과류장궤리분석가지：동력인소불부대단창후방금익당지류장유교대개선，이차대단창화주익상표면류장이급평미당지영각야유현저영향。기우이상결론，재운수궤증승구형설계과정중，요충분고필동력인소대각개부건당지류장적영향이제고승력특성；동시요권형동력인소사궤익저두력구증가、평미저두력구강저저량충추세상반적영향결과이개선부앙력구특성。
To satisfy the design request of efficiency and stability of high-lift system of large transport plane,by the method of CFD (Computational Fluid Dynamic),the research of aerodynamic characteristics of high-lift configuration of large transport plane with the effect of engine jet has been done.The result of nu-merical simulation demonstrates that with the effect of engine jet,the maximum lift coefficient increases by 46.2%,and the stall angle increases by 11 degrees,longitudinal stability factor decreases by 30.89%.Con-clusion can be obtained by analyzing the physics characteristics of flow that the engine jet not only changes local flow fluid of flap after the engine but also changes the local flow fluid on the upper surface of nacelle and main wing and the local angle of attack of horizontal tail.Given the conclusion obtained above,during the procession of designing high-lift configuration of STOL transport airplane,for the lift characteristics the effect of engine jet on the local flow fluid of each part has to be considered;for the pitch moment characteris-tics the reverse effect of engine jet increasing nose-down pitching moment of wing and decreasing that of hori-zontal tail must to be weighted.