CAJ | 학술논문

为改善大型民用运输机的起降性能，以典型的三段翼型为研究对象，研究分布式射流主动控制技术对提高增升装置效率的可行性。给出了零质量射流和分布式零质量射流的作用原理，获得了分布式零质量射流的孔口分布、射流频率、射流动量对增升装置气动性能影响的规律。研究表明：零质量射流不论是吹气或者吸气，都可以增加边界层的能量，延迟分离，使得流动控制整个周期产生的气动效果都要优于未加控制的情形，但其无法完全消除襟翼上表面的分离，分布式零质量射流能达到更好的结果。数值模拟结果表明：零质量射流控制能使升力系数增加7．1％，分布式零质量射流控制能使升力系数增加20．3％，可见分布式零质量射流比零质量射流有更好的控制结果。分布式零质量射流不仅仅是各个孔口射流的简单叠加，而且还受到各个孔口串联作用的有利影响。总结四孔分布式零质量射流的设计准则为：当射流频率为1，射流动量为0．002时，能最大限度地消除襟翼上表面的分离，对升力系数的改善最为明显。
위개선대형민용운수궤적기강성능，이전형적삼단익형위연구대상，연구분포식사류주동공제기술대제고증승장치효솔적가행성。급출료령질량사류화분포식령질량사류적작용원리，획득료분포식령질량사류적공구분포、사류빈솔、사류동량대증승장치기동성능영향적규률。연구표명：령질량사류불론시취기혹자흡기，도가이증가변계층적능량，연지분리，사득류동공제정개주기산생적기동효과도요우우미가공제적정형，단기무법완전소제금익상표면적분리，분포식령질량사류능체도경호적결과。수치모의결과표명：령질량사류공제능사승력계수증가7．1％，분포식령질량사류공제능사승력계수증가20．3％，가견분포식령질량사류비령질량사류유경호적공제결과。분포식령질량사류불부부시각개공구사류적간단첩가，이차환수도각개공구천련작용적유리영향。총결사공분포식령질량사류적설계준칙위：당사류빈솔위1，사류동량위0．002시，능최대한도지소제금익상표면적분리，대승력계수적개선최위명현。
In order to improve takeoff and landing performance of large transport airplane, a typical three element airfoil is selected;we study the feasibility of distributed zero-net mass flux jet for improving the aerodynamic per-formance of the high lift systems. Flow mechanism of zero-net mass flux jet and distributed zero-net mass flux jet and the impact of their parameters are analyzed, including slot distribution, momentum coefficient and excitation frequency. Research results indicate that, no matter blowing or suction, zero-net mass flux jet can improve boundary layer energy and delay flow separation;it is better than one without flow control, but it cannot eliminate flow separation, while distributed zero-net mass flux jet can. Simulation results indicate that, when zero-net mass flux jet is working ,the lift coefficient can increase by 7.1%, while distributed zero-net mass flux jet results in an increase by 20.3%;therefore distributed zero-net mass flux jet has better performance on flow control. Distributed zero-net mass flux jet is not only simple linear integration of every actuator, but also is beneficially influenced by every actuator. Four port distributed zero-net mass flux jet with momentum coefficient of 0.002, excitation frequency of 1 is best;it can eliminate flow separation on flap and improve lift coefficient significantly.