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Your search keyword '"Zhiwei Shi"' showing total 4 results
Start Over Author "Zhiwei Shi" Journal journal of aerospace engineering
4 results on '"Zhiwei Shi"'

2. Aerodynamic Characteristics and Flight Testing of a UAV without Control Surfaces Based on Circulation Control

Author

Zhiwei Shi, Haiyang Wang, Zhang Tongren, Junquan Fu, Jiachen Zhu, Dai Xinxi, Weimin Cai, Kun Chen, and Peiliang Zhang

Subjects
Circulation (fluid dynamics), Mechanical Engineering, Aerospace Engineering, Environmental science, General Materials Science, Rudder, Flight control surfaces, Aerodynamics, Flight test, Civil and Structural Engineering, Marine engineering
Abstract

Attitude control of a conventional aircraft usually depends on its rudder surface, which reduces the aircraft’s stealth abilities and makes it heavier. To improve aerodynamic performance an...

Published
2019

3. Influence of Strake Wing on Unsteady Characteristics of an Aircraft Undergoing Lateral Motions

Author

Bailong Zhu, Zhiwei Shi, Xi Geng, and Keming Cheng

Subjects
Engineering, Wing, business.industry, Oscillation, Mechanical Engineering, Aerospace Engineering, Flight dynamics (fixed-wing aircraft), Aerodynamics, Mechanics, Strake, Vortex, Physics::Fluid Dynamics, Moment (mathematics), Flow control (fluid), Control theory, General Materials Science, business, Civil and Structural Engineering
Abstract

In this paper, the influences of strake wing on unsteady characteristics of aircraft at high angle of attack during rolling oscillation, yawing oscillation, and coupled motion at different frequencies is investigated by using a forced oscillation test rig. The experiments include dynamic force and flow field measurements. As the results show, the rolling moments are affected by the vortices generated by the strake wing. The rolling moment is large and shows strong hysteresis both in the rolling and yawing oscillations. The value of the rolling moment coefficient is small in the coupled motion. The change of the rolling moment is related to the unsteady development of the strake vortices. The characteristics are almost the same for the yawing moment, which may mainly be affected by the sideslip angle. This paper is for the aerodynamic configuration design and the flight control design using flow control method.

Published
2015

4. Influence of Strake Wing on Unsteady Characteristics of an Aircraft Undergoing Lateral Motions.

Author

Xi Geng, Zhiwei Shi, Keming Cheng, and Bailong Zhu

Subjects
*OSCILLATIONS, *HYSTERESIS, *AERODYNAMICS, *FLIGHT control systems, *UNSTEADY flow (Aerodynamics)
Abstract

In this paper, the influences of strake wing on unsteady characteristics of aircraft at high angle of attack during rolling oscillation, yawing oscillation, and coupled motion at different frequencies is investigated by using a forced oscillation test rig. The experiments include dynamic force and flow field measurements. As the results show, the rolling moments are affected by the vortices generated by the strake wing. The rolling moment is large and shows strong hysteresis both in the rolling and yawing oscillations. The value of the rolling moment coefficient is small in the coupled motion. The change of the rolling moment is related to the unsteady development of the strake vortices. The characteristics are almost the same for the yawing moment, which may mainly be affected by the sideslip angle. This paper is for the aerodynamic configuration design and the flight control design using flow control method. [ABSTRACT FROM AUTHOR]

Published
2015
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