| RESEARCH ON THE HYSTERESIS PROPERTIES OF UNSTEADY AERODYNAMICS ABOUT THE OSCILLATING WINGS |
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| 作者姓名： | 高正红 |
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| 作者单位： | Gao Zhenghong (高正红) (Department of Aircraft Engineering，Northwestern Polytechnical University，Xi'an 710072，P R China) (Communicated by Chien
Weizang) |
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| 摘 要： | ＩｎｔｒｏｄｕｃｔｉｏｎＡｓｔｈｅｒｅｑｕｉｒｅｍｅｎｔｏｆｈｉｇｈｐｅｒｆｏｒｍａｎｃｅａｎｄｍａｎｅｕｖｅｒａｂｉｌｉｔｙ，ｔｈｅｎｅｘｔｇｅｎｅｒａｔｉｏｎｏｆｔｈｅｆｉｇｈｔｅｒａｉｒｃｒａｆｔｉｓｂｅｉｎｇｄｅｓｉｇｎｅｄｔｏｆｌｙａｎｄｂ...
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| 收稿时间： | 20 January 1997 |
Research on the hysteresis properties of unsteady aerodynamics about the oscillating wings |
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| Gao Zhenghong.RESEARCH ON THE HYSTERESIS PROPERTIES OF UNSTEADY AERODYNAMICS ABOUT THE OSCILLATING WINGS[J].Applied Mathematics and Mechanics(English Edition),1999,20(8):895-907. |
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| Authors: | Gao Zhenghong |
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| Institution: | (1) Department of Aircraft Engineering, Northwesterm Polytechnical University, 710072 Xi'an, P R China |
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| Abstract: | In the work, it is shown the numerical investigations about the unsteady
inviscid results obtained for the pitching oscillating wings at different angles of attack. The
results are obtained by solving the unsteady Euler equations in a body_fitted coordinate
system. It is based on the four_stage Runge_Kutta time stepping scheme. Meanwhile to
increase the time step that is limited by Courant limit (CFL), the implicit residual smoothing with
local variable parameters is used. As a result, the unsteady aerodynamics about a rectangular
wing and a delta wing, which are oscillated in pitching with different frequencies, are shown in
this paper. The properties of the unsteady aerodynamics in these cases are researched here. |
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| Keywords: | unsteady flow hysteresis high angle of attach vortical flow |
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