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以飞机起降过程中主翼和尾翼产生反向涡系存在相互作用的事实为背景,设计了一套反向双漩涡发生装置。通过改变两涡的位置关系与初始涡强度比值,采用流动显示与粒子成像测速(PIV)技术,对涡系相交不稳定性的作用特性进行了研究。结果表明:小涡的引入改变了主涡原有运动轨迹,合理地引入小涡的位置与小涡的强度,对主涡能量的衰减有明显的促进作用,但它们之间不呈现明显的线性关系;涡空间运动轨迹的分析,对未来完善机场起降控制模型有一定借鉴意义;实验结果也为飞机整体设计提供了一定参考依据,在满足飞行力学的设计基础上,优化整体气动布局对降低飞机尾流强度有显著的影响。
In the light of the fact that the main vane and the tail vane produce reverse vortex system during the take-off and landing of an airplane, an anti-double whirlpool generating device is designed. By changing the relationship between the two vortices and the initial eddy intensity ratio, the effect of instability of the vortex system was studied by using flow visualization and particle image velocimetry (PIV). The results show that the introduction of small vortex changes the motion trajectory of original vortex and introduces the position of small vortex and the intensity of small vortex effectively, which obviously promotes the energy attenuation of main vortex. However, it does not show obvious linearity The analysis of trajectory of vortex space has some reference significance for improving the takeoff and landing control model of the airport in the future. The experimental results also provide some references for the overall design of aircraft. Based on the design of flight mechanics, the overall aerodynamic layout is optimized to reduce Aircraft wake strength has a significant impact.