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- W2325425023 abstract "The wind tunnel experiments was conducted to get inspiration for understanding the mechanism of the asymmetric flow pattern and developing an innovative flow control technique for a slender body at high angle of attack. The bi-stable situation of the side forces was observed which could be easily switched by a tiny disturbances either from coming flow or from artificial disturbances at nose tip (including manufacturing defect). In turbulent flows the side forces switched randomly between positive and negative. There existed a hysteresis loop of side force with the rolling angle. A rod in front of the slender body was used to change the vortex pattern, which could be kept even the rod was moved out from the stream. A miniature strake attached to the nose tip of the model could be moved to different circumferential position. When the strake was stationary, the hysteresis loop disappeared and the side force did not change with the turbulent fluctuation of coming flow. The results from dynamic measurements of section side force indicated that when the strake swung at lower frequency the side force could follow the cadence of the swinging strake. With increasing frequency, the magnitude of the side force decreased. At still high frequency, the side force diminished to zero. If the strake was swinging, while the middle position could be changed to different circumferential angleΦS on either left or right side, the side forces could be changed proportionally with the angleΦS. On the basis of the experimental results, the mechanism of the asymmetry is discussed." @default.
- W2325425023 created "2016-06-24" @default.
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- W2325425023 date "2006-06-05" @default.
- W2325425023 modified "2023-09-23" @default.
- W2325425023 title "An Innovative Control Technique for Slender Bodies at High Angle of Attack" @default.
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- W2325425023 doi "https://doi.org/10.2514/6.2006-3688" @default.
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