孙之骏, 顾蕴松, 赵航. 流向涡-面干扰流动特征[J]. 空气动力学学报, 2020, 38(3): 470-478. DOI: 10.7638/kqdlxxb-2019.0026
引用本文: 孙之骏, 顾蕴松, 赵航. 流向涡-面干扰流动特征[J]. 空气动力学学报, 2020, 38(3): 470-478. DOI: 10.7638/kqdlxxb-2019.0026
SUN Zhijun, GU Yunsong, ZHAO Hang. Experimental investigation of streamwise vortex-surface interaction[J]. ACTA AERODYNAMICA SINICA, 2020, 38(3): 470-478. DOI: 10.7638/kqdlxxb-2019.0026
Citation: SUN Zhijun, GU Yunsong, ZHAO Hang. Experimental investigation of streamwise vortex-surface interaction[J]. ACTA AERODYNAMICA SINICA, 2020, 38(3): 470-478. DOI: 10.7638/kqdlxxb-2019.0026

流向涡-面干扰流动特征

Experimental investigation of streamwise vortex-surface interaction

  • 摘要: 旋涡与物面相互作用广泛存在于各类飞行器的绕流中,旋涡改变了物面的压力分布,物面影响了旋涡的空间演化,进而影响飞行器的气动特性。针对流向涡与物面相互作用过程中的流动压力特征关系开展研究。采用风洞试验手段,获取旋涡流动结构的空间演化规律及物面压力载荷分布特征。结果表明:流向涡在作用过程中不仅会发生展向位移,而且会发生法向离面位移。试验参数范围内,入射高度降低0.1c,展向位移最大量增加0.3c,法向位移最大量增加0.02c。物面受旋涡影响出现集中的条带状低压分布以及“双峰形”压力脉动集中区。物面压力特征变化可为后续开展涡-面流动模型重构研究提供试验支撑。

     

    Abstract: The interaction between vortices and the object surface exists in various situations. The vortex changes the pressure distribution of the surface, and the object influences the evolution of the vortex structure. By focusing on the typical flow problem of streamwise vortex and object surface interaction, the evolution of vortex flow structure and the change of surface pressure distribution are studied by means of wind tunnel test. During the evolution of streamwise vortex, not only the spanwise displacement but also the off-plane displacement occurs. With the incidence height decreased by 0.1c, the maximal spanwise displacement increases by 0.3c, and the maximal off-plane displacement increases by 0.02c. It can be observed from the dynamic pressure measurement results that the streamwise vortex leads to a concentrated strip low pressure distribution and pressure fluctuation concentration area on the plate. The study of vortex-surface interaction is helpful to understand the physical mechanism of the interaction between vortices and aerodynamic surface, and to further understand the influence of complex vortex flow on the component load and aerodynamic characteristics of aircraft.

     

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